Methane
- Formula: CH4
- Molecular weight: 16.0425
- IUPAC Standard InChIKey: VNWKTOKETHGBQD-UHFFFAOYSA-N
- CAS Registry Number: 74-82-8
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: Marsh gas; Methyl hydride; CH4; Fire Damp; R 50; Biogas; R 50 (refrigerant)
- Permanent link for this species. Use this link for bookmarking this species for future reference.
- Information on this page:
- Other data available:
- Reaction thermochemistry data: reactions 1 to 50, reactions 51 to 100, reactions 101 to 112
- IR Spectrum
- Vibrational and/or electronic energy levels
- Fluid Properties
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Gas phase thermochemistry data
Go To: Top, Phase change data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
DRB - Donald R. Burgess, Jr.
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°gas | -17.89 | kcal/mol | Review | Chase, 1998 | Data last reviewed in March, 1961 |
ΔfH°gas | -17.8 ± 0.07 | kcal/mol | Review | Manion, 2002 | adopted recommendation of Gurvich, Veyts, et al., 1991; DRB |
ΔfH°gas | -17.8 ± 0.1 | kcal/mol | Ccb | Pittam and Pilcher, 1972 | ALS |
ΔfH°gas | -17.889 ± 0.075 | kcal/mol | Ccb | Prosen and Rossini, 1945 | Hf derived from Heat of Hydrogenation; ALS |
ΔfH°gas | -17.54 ± 0.26 | kcal/mol | Ccb | Roth and Banse, 1932 | Reanalyzed by Cox and Pilcher, 1970, Original value = -17.97 kcal/mol; ALS |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°gas | -212.88 ± 0.09 | kcal/mol | Ccb | Pittam and Pilcher, 1972 | Corresponding ΔfHºgas = -17.80 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
ΔcH°gas | -212.798 ± 0.072 | kcal/mol | Ccb | Prosen and Rossini, 1945 | Hf derived from Heat of Hydrogenation; Corresponding ΔfHºgas = -17.883 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
ΔcH°gas | -213.14 ± 0.26 | kcal/mol | Ccb | Roth and Banse, 1932 | Reanalyzed by Cox and Pilcher, 1970, Original value = -212.07 ± 0.25 kcal/mol; Corresponding ΔfHºgas = -17.54 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
ΔcH°gas | -212.753 ± 0.072 | kcal/mol | Cm | Rossini, 1931 | Corresponding ΔfHºgas = -17.928 kcal/mol (simple calculation by NIST; no Washburn corrections); ALS |
Quantity | Value | Units | Method | Reference | Comment |
S°gas | 45.09 ± 0.10 | cal/mol*K | N/A | Colwell J.H., 1963 | The calorimetric value is significantly higher than the statistically calculated entropy, 186.26 J/mol*K, which remains the best value for use in thermodynamic calculations [ Vogt G.J., 1976, Friend D.G., 1989, Gurvich, Veyts, et al., 1989]. Earlier the value of 185.3 J/mol*K was calculated from experimental data [ Giauque W.F., 1931]. The value of S(298.15 K)=185.94 J/mol*K was obtained by high accuracy ab initio calculation [ East A.L.L., 1997].; GT |
Quantity | Value | Units | Method | Reference | Comment |
S°gas,1 bar | 44.515 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in March, 1961 |
Constant pressure heat capacity of gas
Cp,gas (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
8.346 ± 0.060 | 279. | Halford J.O., 1957 | GT |
Constant pressure heat capacity of gas
Cp,gas (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
7.954 | 100. | Gurvich, Veyts, et al., 1989 | p=1 bar. Because of more precise method of calculation, the recommended values are more accurate, especially at high temperatures, than those obtained by [ McDowell R.S., 1963] and often regarded as reference data [ Friend D.G., 1989].; GT |
8.009 | 200. | ||
8.530 | 298.15 | ||
8.547 | 300. | ||
9.711 | 400. | ||
11.14 | 500. | ||
12.61 | 600. | ||
14.01 | 700. | ||
15.32 | 800. | ||
16.52 | 900. | ||
17.63 | 1000. | ||
18.62 | 1100. | ||
19.52 | 1200. | ||
20.33 | 1300. | ||
21.06 | 1400. | ||
21.72 | 1500. | ||
22.31 | 1600. | ||
22.84 | 1700. | ||
23.33 | 1800. | ||
23.78 | 1900. | ||
24.197 | 2000. | ||
24.577 | 2100. | ||
24.931 | 2200. | ||
25.263 | 2300. | ||
25.574 | 2400. | ||
25.868 | 2500. | ||
26.145 | 2600. | ||
26.410 | 2700. | ||
26.663 | 2800. | ||
26.905 | 2900. | ||
27.139 | 3000. |
Gas Phase Heat Capacity (Shomate Equation)
Cp° = A + B*t + C*t2 + D*t3 +
E/t2
H° − H°298.15= A*t + B*t2/2 +
C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 −
E/(2*t2) + G
Cp = heat capacity (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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Temperature (K) | 298. to 1300. | 1300. to 6000. |
---|---|---|
A | -0.168028 | 20.50960 |
B | 25.92670 | 2.692321 |
C | -10.16290 | -0.505293 |
D | 1.401240 | 0.033028 |
E | 0.162181 | -6.315060 |
F | -18.36610 | -36.69520 |
G | 37.93411 | 53.63631 |
H | -17.89510 | -17.89510 |
Reference | Chase, 1998 | Chase, 1998 |
Comment | Data last reviewed in March, 1961 | Data last reviewed in March, 1961 |
Phase change data
Go To: Top, Gas phase thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
DH - Eugene S. Domalski and Elizabeth D. Hearing
AC - William E. Acree, Jr., James S. Chickos
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 111. ± 2. | K | AVG | N/A | Average of 13 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 85.7 | K | N/A | Streng, 1971 | Uncertainty assigned by TRC = 0.2 K; TRC |
Tfus | 90.6 | K | N/A | Van't Zelfde, Omar, et al., 1968 | Uncertainty assigned by TRC = 0.3 K; TRC |
Tfus | 91.2 | K | N/A | Timmermans, 1935 | Uncertainty assigned by TRC = 2. K; TRC |
Tfus | 90.6 | K | N/A | Clusius, 1929 | Uncertainty assigned by TRC = 0.2 K; TRC |
Tfus | 90.5 | K | N/A | Eucken and Karwat, 1924 | Uncertainty assigned by TRC = 0.2 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 90.67 ± 0.03 | K | AVG | N/A | Average of 25 out of 32 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Ptriple | 0.1154 ± 0.0006 | atm | AVG | N/A | Average of 20 out of 23 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Tc | 190.6 ± 0.3 | K | AVG | N/A | Average of 19 out of 23 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Pc | 45.5 ± 0.3 | atm | AVG | N/A | Average of 16 out of 21 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Vc | 0.09860 | l/mol | N/A | Ambrose and Tsonopoulos, 1995 | |
Vc | 0.09852 | l/mol | N/A | Younglove and Ely, 1987 | TRC |
Vc | 0.100 | l/mol | N/A | Terry, Lynch, et al., 1969 | Uncertainty assigned by TRC = 0.001 l/mol; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ρc | 10.1 ± 0.2 | mol/l | AVG | N/A | Average of 16 out of 17 values; Individual data points |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
2.036 | 99.54 | N/A | Vogt and Pitzer, 1976 | P = 2.81 kPa Data from Frank and Clusius, 1937 and 39FRA/CLU.; DH |
2.1 | 101. | N/A | Stock, Henning, et al., 2006 | Based on data from 92. to 110. K. See also Boublik, Fried, et al., 1984.; AC |
2.1 | 105. | A | Stephenson and Malanowski, 1987 | Based on data from 90. to 120. K.; AC |
2.0 | 134. | A | Stephenson and Malanowski, 1987 | Based on data from 115. to 149. K.; AC |
2.1 | 174. | A | Stephenson and Malanowski, 1987 | Based on data from 148. to 189. K.; AC |
1.95 | 111.7 | N/A | Majer and Svoboda, 1985 | |
2.1 | 112. | N/A | Ott, Goates, et al., 1972 | Based on data from 91. to 127. K. See also Boublik, Fried, et al., 1984.; AC |
2.0 | 175. | N/A | Ott, Goates, et al., 1972 | Based on data from 91. to 190. K.; AC |
1.9 | 137. | N/A | Reid, 1972 | AC |
2.1 | 175. | N/A | Ambrose, Counsell, et al., 1970 | Based on data from 100. to 190. K.; AC |
2.0 | 112. | C | Hestermans and White, 1961 | AC |
1.8 | 130. | C | Hestermans and White, 1961 | AC |
1.4 | 160. | C | Hestermans and White, 1961 | AC |
0.96 | 180. | C | Hestermans and White, 1961 | AC |
2.0 | 149. | N/A | Hestermans and White, 1961 | Based on data from 109. to 189. K.; AC |
2.0 ± 0.02 | 99. | N/A | Frank and Clusius, 1939 | AC |
Enthalpy of vaporization
ΔvapH = A exp(-αTr)
(1 − Tr)β
ΔvapH =
Enthalpy of vaporization (at saturation pressure)
(kcal/mol)
Tr = reduced temperature (T / Tc)
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Temperature (K) | 112. to 180. |
---|---|
A (kcal/mol) | 2.416 |
α | -0.22 |
β | 0.388 |
Tc (K) | 190.6 |
Reference | Majer and Svoboda, 1985 |
Entropy of vaporization
ΔvapS (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
20.45 | 99.54 | Vogt and Pitzer, 1976 | P; DH |
Antoine Equation Parameters
log10(P) = A − (B / (T + C))
P = vapor pressure (atm)
T = temperature (K)
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Temperature (K) | A | B | C | Reference | Comment |
---|---|---|---|---|---|
90.99 to 189.99 | 3.9838 | 443.028 | -0.49 | Prydz and Goodwin, 1972 | Coefficents calculated by NIST from author's data. |
96.89 to 110.19 | 1.99682 | 125.819 | -48.823 | Regnier, 1972 | Coefficents calculated by NIST from author's data. |
93.04 to 107.84 | 3.79664 | 403.106 | -5.479 | Cutler and Morrison, 1965 | Coefficents calculated by NIST from author's data. |
110.00 to 190.5 | 4.21490 | 516.689 | 11.223 | Hestermans and White, 1961 | Coefficents calculated by NIST from author's data. |
Enthalpy of sublimation
ΔsubH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
2.3 | 72. | N/A | Stephenson and Malanowski, 1987 | Based on data from 53. to 91. K.; AC |
2.2 | 72. | N/A | Bondi, 1963 | Based on data from 54. to 90. K. See also Armstrong, Brickwedde, et al., 1955.; AC |
2.39 | 84. | N/A | Jones, 1960 | Based on data from 79. to 89. K.; AC |
2.3 | 63. | A,MS | Tickner and Lossing, 1951 | Based on data from 48. to 78. K.; AC |
2.30 | 77. | A | Stull, 1947 | Based on data from 67. to 88. K.; AC |
Enthalpy of phase transition
ΔHtrs (kcal/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
0.02236 | 20.53 | crystaline, II | crystaline, I | Vogt and Pitzer, 1976 | Lambda transition.; DH |
0.2245 | 90.67 | crystaline, I | liquid | Vogt and Pitzer, 1976 | DH |
Entropy of phase transition
ΔStrs (cal/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
---|---|---|---|---|---|
1.089 | 20.53 | crystaline, II | crystaline, I | Vogt and Pitzer, 1976 | Lambda; DH |
2.476 | 90.67 | crystaline, I | liquid | Vogt and Pitzer, 1976 | DH |
Henry's Law data
Go To: Top, Gas phase thermochemistry data, Phase change data, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Rolf Sander
Henry's Law constant (water solution)
kH(T) = k°H exp(d(ln(kH))/d(1/T) ((1/T) - 1/(298.15 K)))
k°H = Henry's law constant for solubility in water at 298.15 K (mol/(kg*bar))
d(ln(kH))/d(1/T) = Temperature dependence constant (K)
k°H (mol/(kg*bar)) | d(ln(kH))/d(1/T) (K) | Method | Reference | Comment |
---|---|---|---|---|
0.0014 | 1600. | L | N/A | The parameterization given by missing citation (parameters A, B, C) doesn't fit the data in the same paper for this substance. Therefore the parameteriztaion of the solubility data (X1) was recalculated. |
0.0013 | 1900. | Q | N/A | Only the tabulated data between T = 273. K and T = 303. K from missing citation was used to derive kH and -Δ kH/R. Above T = 303. K the tabulated data could not be parameterized by equation (reference missing) very well. The partial pressure of water vapor (needed to convert some Henry's law constants) was calculated using the formula given by missing citation. The quantities A and α from missing citation were assumed to be identical. |
0.0015 | Q | N/A | missing citation give several references for the Henry's law constants but don't assign them to specific species. | |
0.0013 | L | N/A | ||
0.0013 | 1800. | X | N/A | |
0.0014 | 1700. | L | N/A | |
0.0015 | V | N/A | ||
0.00097 | C | N/A | ||
0.0014 | R | N/A | ||
0.0092 | V | N/A |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, Phase change data, Henry's Law data, Ion clustering data, Mass spectrum (electron ionization), References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias
Data compiled as indicated in comments:
B - John E. Bartmess
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
View reactions leading to CH4+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
IE (evaluated) | 12.61 ± 0.01 | eV | N/A | N/A | L |
Quantity | Value | Units | Method | Reference | Comment |
Proton affinity (review) | 129.9 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 124.4 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
Appearance energy determinations
De-protonation reactions
CH3- + =
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 416.74 ± 0.70 | kcal/mol | D-EA | Ellison, Engelking, et al., 1978 | gas phase; B |
ΔrH° | 418.0 ± 3.5 | kcal/mol | CIDT | Graul and Squires, 1990 | gas phase; B |
ΔrH° | >404.18 ± 0.10 | kcal/mol | G+TS | Bohme, Lee-Ruff, et al., 1972 | gas phase; B |
ΔrH° | 414.80 | kcal/mol | N/A | Check, Faust, et al., 2001 | gas phase; FeBr3; ; ΔS(EA)=9.3; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 408.66 ± 0.80 | kcal/mol | H-TS | Ellison, Engelking, et al., 1978 | gas phase; B |
ΔrG° | 409.9 ± 3.6 | kcal/mol | H-TS | Graul and Squires, 1990 | gas phase; B |
ΔrG° | >396.10 | kcal/mol | IMRB | Bohme, Lee-Ruff, et al., 1972 | gas phase; B |
ΔrG° | 407.30 | kcal/mol | N/A | Check, Faust, et al., 2001 | gas phase; FeBr3; ; ΔS(EA)=9.3; B |
Ion clustering data
Go To: Top, Gas phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, Mass spectrum (electron ionization), References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
RCD - Robert C. Dunbar
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.
Clustering reactions
+ = CH4Br-
By formula: Br- + CH4 = CH4Br-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 3.10 | kcal/mol | N/A | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -2.27 | kcal/mol | TDAs | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
By formula: CF3+ + CH4 = (CF3+ • CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 4.6 | kcal/mol | HPMS | Bennet and Field, 1972 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 18.8 | cal/mol*K | HPMS | Bennet and Field, 1972 | gas phase; M |
By formula: CH4Cl- + 2CH4 = C2H8Cl-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 3.50 | kcal/mol | N/A | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -3.06 | kcal/mol | TDAs | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
By formula: CH4F- + 2CH4 = C2H8F-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 5.90 | kcal/mol | N/A | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -0.36 | kcal/mol | TDAs | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
By formula: CH5+ + CH4 = (CH5+ • CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 6.9 ± 0.3 | kcal/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
ΔrH° | 7.4 | kcal/mol | PHPMS | Hiraoka and Kebarle, 1975 | gas phase; M |
ΔrH° | 4.1 | kcal/mol | HPMS | Field and Beggs, 1971 | gas phase; Entropy change is questionable; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 22.1 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
ΔrS° | 20.8 | cal/mol*K | PHPMS | Hiraoka and Kebarle, 1975 | gas phase; M |
ΔrS° | 12.4 | cal/mol*K | HPMS | Field and Beggs, 1971 | gas phase; Entropy change is questionable; M |
By formula: (CH5+ • CH4) + CH4 = (CH5+ • 2CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 5.3 ± 0.3 | kcal/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
ΔrH° | 5.9 | kcal/mol | PHPMS | Hiraoka and Kebarle, 1975 | gas phase; M |
ΔrH° | 1.5 | kcal/mol | HPMS | Field and Beggs, 1971 | gas phase; Entropy change is questionable; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 24.9 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
ΔrS° | 24.4 | cal/mol*K | PHPMS | Hiraoka and Kebarle, 1975 | gas phase; M |
ΔrS° | 7.2 | cal/mol*K | HPMS | Field and Beggs, 1971 | gas phase; Entropy change is questionable; M |
By formula: (CH5+ • 2CH4) + CH4 = (CH5+ • 3CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 3.1 ± 0.2 | kcal/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
ΔrH° | 4.1 | kcal/mol | PHPMS | Hiraoka and Kebarle, 1975 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 22.4 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
ΔrS° | 26.1 | cal/mol*K | PHPMS | Hiraoka and Kebarle, 1975 | gas phase; M |
By formula: (CH5+ • 3CH4) + CH4 = (CH5+ • 4CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 3.0 ± 0.2 | kcal/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
ΔrH° | 3.9 | kcal/mol | PHPMS | Hiraoka and Kebarle, 1975 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 23.7 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
ΔrS° | 26.6 | cal/mol*K | PHPMS | Hiraoka and Kebarle, 1975 | gas phase; M |
By formula: (CH5+ • 4CH4) + CH4 = (CH5+ • 5CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.8 ± 0.2 | kcal/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 24.8 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (CH5+ • 5CH4) + CH4 = (CH5+ • 6CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.7 ± 0.2 | kcal/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 25.3 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (CH5+ • 6CH4) + CH4 = (CH5+ • 7CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.7 ± 0.2 | kcal/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 26.5 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (CH5+ • 7CH4) + CH4 = (CH5+ • 8CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.0 ± 0.2 | kcal/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 21.6 | cal/mol*K | PHPMS | Hiraoka and Mori, 1989 | gas phase; M |
By formula: (CH5+ • 8CH4) + CH4 = (CH5+ • 9CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.54 | kcal/mol | PHPMS | Hiraoka and Mori, 1989 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 20. | cal/mol*K | N/A | Hiraoka and Mori, 1989 | gas phase; Entropy change calculated or estimated; M |
By formula: C2H5+ + CH4 = (C2H5+ • CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 5.50 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
ΔrH° | 6.6 | kcal/mol | PHPMS | Hiroka and Kebarle, 1975 | gas phase; M |
ΔrH° | 2.4 | kcal/mol | HPMS | Field and Beggs, 1971 | gas phase; Entropy change is questionable; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 22.2 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
ΔrS° | 23.4 | cal/mol*K | PHPMS | Hiroka and Kebarle, 1975 | gas phase; M |
ΔrS° | 8.6 | cal/mol*K | HPMS | Field and Beggs, 1971 | gas phase; Entropy change is questionable; M |
By formula: (C2H5+ • CH4) + CH4 = (C2H5+ • 2CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.37 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 16.1 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
By formula: (C2H5+ • 2CH4) + CH4 = (C2H5+ • 3CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.28 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 17.9 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
By formula: (C2H5+ • 3CH4) + CH4 = (C2H5+ • 4CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.26 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 18.4 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
By formula: (C2H5+ • 4CH4) + CH4 = (C2H5+ • 5CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.22 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 18.9 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
By formula: (C2H5+ • 5CH4) + CH4 = (C2H5+ • 6CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.21 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 19.4 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
By formula: (C2H5+ • 6CH4) + CH4 = (C2H5+ • 7CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.13 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 20.7 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
By formula: (C2H5+ • 7CH4) + CH4 = (C2H5+ • 8CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.10 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 21.0 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
By formula: (C2H5+ • 8CH4) + CH4 = (C2H5+ • 9CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.08 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 21.8 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
By formula: (C2H5+ • 9CH4) + CH4 = (C2H5+ • 10CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.91 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 22. | cal/mol*K | N/A | Hiraoka, Mori, et al., 1993 | gas phase; Entropy change calculated or estimated; M |
By formula: C2H8F- + 3CH4 = C3H12F-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 5.50 | kcal/mol | N/A | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -1.36 | kcal/mol | TDAs | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
By formula: C3H7+ + CH4 = (C3H7+ • CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.59 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
ΔrH° | 3.4 | kcal/mol | PHPMS | Hiraoka and Kebarle, 1976 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 17.4 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
ΔrS° | 20. | cal/mol*K | PHPMS | Hiraoka and Kebarle, 1976 | gas phase; M |
By formula: (C3H7+ • CH4) + CH4 = (C3H7+ • 2CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.45 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 19.0 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
By formula: (C3H7+ • 2CH4) + CH4 = (C3H7+ • 3CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.26 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 18.4 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
By formula: (C3H7+ • 3CH4) + CH4 = (C3H7+ • 4CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.20 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 19.0 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
By formula: (C3H7+ • 4CH4) + CH4 = (C3H7+ • 5CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.20 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 20.9 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
By formula: (C3H7+ • 5CH4) + CH4 = (C3H7+ • 6CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.19 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 21.0 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
By formula: (C3H7+ • 6CH4) + CH4 = (C3H7+ • 7CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.16 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 21.8 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
By formula: (C3H7+ • 7CH4) + CH4 = (C3H7+ • 8CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.98 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 22. | cal/mol*K | N/A | Hiraoka, Mori, et al., 1993 | gas phase; Entropy change calculated or estimated; M |
By formula: C3H12F- + 4CH4 = C4H16F-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 5.00 | kcal/mol | N/A | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -2.16 | kcal/mol | TDAs | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
By formula: C4H9+ + CH4 = (C4H9+ • CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.48 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 19.5 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
By formula: (C4H9+ • CH4) + CH4 = (C4H9+ • 2CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.39 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 19.4 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
By formula: (C4H9+ • 2CH4) + CH4 = (C4H9+ • 3CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.37 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 19.7 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
By formula: (C4H9+ • 3CH4) + CH4 = (C4H9+ • 4CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.36 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 20.0 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
By formula: (C4H9+ • 4CH4) + CH4 = (C4H9+ • 5CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.21 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 19.4 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
By formula: (C4H9+ • 5CH4) + CH4 = (C4H9+ • 6CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.09 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 19.3 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
By formula: (C4H9+ • 6CH4) + CH4 = (C4H9+ • 7CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.05 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 19.7 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
By formula: (C4H9+ • 7CH4) + CH4 = (C4H9+ • 8CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.99 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 20.1 | cal/mol*K | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; M |
By formula: (C4H9+ • 8CH4) + CH4 = (C4H9+ • 9CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.86 | kcal/mol | PHPMS | Hiraoka, Mori, et al., 1993 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 20. | cal/mol*K | N/A | Hiraoka, Mori, et al., 1993 | gas phase; Entropy change calculated or estimated; M |
By formula: C4H16F- + 5CH4 = C5H20F-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 4.50 | kcal/mol | N/A | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -2.95 | kcal/mol | TDAs | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
By formula: C5H20F- + 6CH4 = C6H24F-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 4.20 | kcal/mol | N/A | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -3.25 | kcal/mol | TDAs | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
By formula: C5MnO5+ + CH4 = (C5MnO5+ • CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 7.2 | kcal/mol | ICRCD | Hop and McMahon, 1991 | gas phase; Ar collision gas, ΔrH<; M |
By formula: C6H24F- + 7CH4 = C7H28F-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 3.30 | kcal/mol | N/A | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -2.96 | kcal/mol | TDAs | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
By formula: C7H28F- + 8CH4 = C8H32F-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.90 | kcal/mol | N/A | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -3.66 | kcal/mol | TDAs | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
By formula: C8H32F- + 9CH4 = C9H36F-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.30 | kcal/mol | N/A | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -3.96 | kcal/mol | TDAs | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
By formula: C9H36F- + 10CH4 = C10H40F-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 1.80 | kcal/mol | N/A | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -4.16 | kcal/mol | TDAs | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
+ = CH4Cl-
By formula: Cl- + CH4 = CH4Cl-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 3.80 | kcal/mol | N/A | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -2.16 | kcal/mol | TDAs | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
By formula: Co+ + CH4 = (Co+ • CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrS° | 19.8 | cal/mol*K | SIDT | Kemper, Bushnell, et al., 1993 | gas phase; ΔrS(530 K); M |
Enthalpy of reaction
ΔrH° (kcal/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
21.5 (+1.6,-0.) | CID | Haynes and Armentrout, 1996 | gas phase; guided ion beam CID; M | |
21.5 (+1.4,-0.) | CID | Armentrout and Kickel, 1994 | gas phase; guided ion beam CID; M | |
22.5 (+0.5,-0.) | SIDT | Kemper, Bushnell, et al., 1993 | gas phase; ΔrS(530 K); M |
By formula: (Co+ • CH4) + CH4 = (Co+ • 2CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrS° | 26.1 | cal/mol*K | SIDT | Kemper, Bushnell, et al., 1993 | gas phase; ΔrS(500 K); M |
Enthalpy of reaction
ΔrH° (kcal/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
22.9 (+1.2,-0.) | CID | Armentrout and Kickel, 1994 | gas phase; guided ion beam CID; M | |
24.8 (+1.0,-0.) | SIDT | Kemper, Bushnell, et al., 1993 | gas phase; ΔrS(500 K); M |
By formula: (Co+ • 2CH4) + CH4 = (Co+ • 3CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 11. | kcal/mol | SIDT | Kemper, Bushnell, et al., 1993 | gas phase; Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 20. | cal/mol*K | N/A | Kemper, Bushnell, et al., 1993 | gas phase; Entropy change calculated or estimated; M |
Enthalpy of reaction
ΔrH° (kcal/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
9.8 (+1.2,-0.) | CID | Armentrout and Kickel, 1994 | gas phase; guided ion beam CID; M |
Free energy of reaction
ΔrG° (kcal/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
0.7 | 477. | SIDT | Kemper, Bushnell, et al., 1993 | gas phase; Entropy change calculated or estimated; M |
By formula: (Co+ • 3CH4) + CH4 = (Co+ • 4CH4)
Enthalpy of reaction
ΔrH° (kcal/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
16.2 (+1.4,-0.) | CID | Armentrout and Kickel, 1994 | gas phase; guided ion beam CID; M |
By formula: (Co+ • C2H6) + CH4 = (Co+ • CH4 • C2H6)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrS° | 26.4 | cal/mol*K | SIDT | Kemper, Bushnell, et al., 1993 | gas phase; ΔrS(490 K); M |
Enthalpy of reaction
ΔrH° (kcal/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
24.4 (+1.1,-0.) | SIDT | Kemper, Bushnell, et al., 1993 | gas phase; ΔrS(490 K); M |
By formula: (Co+ • H2O) + CH4 = (Co+ • CH4 • H2O)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrS° | 27.0 | cal/mol*K | SIDT | Kemper, Bushnell, et al., 1993 | gas phase; ΔrS(525 K); M |
Enthalpy of reaction
ΔrH° (kcal/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
25.9 (+0.7,-0.) | SIDT | Kemper, Bushnell, et al., 1993 | gas phase; ΔrS(525 K); M |
By formula: (Co+ • H2) + CH4 = (Co+ • CH4 • H2)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrS° | 21.8 | cal/mol*K | SIDT | Kemper, Bushnell, et al., 1993 | gas phase; switching reaction(Co+)2H2, ΔrS(440 K); Kemper, Bushnell, et al., 1993, 2; M |
Enthalpy of reaction
ΔrH° (kcal/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
22.6 (+1.2,-0.) | SIDT | Kemper, Bushnell, et al., 1993 | gas phase; switching reaction(Co+)2H2, ΔrS(440 K); Kemper, Bushnell, et al., 1993, 2; M |
+ = CH4F-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 6.70 | kcal/mol | N/A | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 1.63 | kcal/mol | TDAs | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
By formula: Fe+ + CH4 = (Fe+ • CH4)
Enthalpy of reaction
ΔrH° (kcal/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
13.6 (+0.7,-0.) | CID | Armentrout and Kickel, 1994 | gas phase; guided ion beam CID; M |
By formula: (Fe+ • CH4) + CH4 = (Fe+ • 2CH4)
Enthalpy of reaction
ΔrH° (kcal/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
23.2 (+1.0,-0.) | CID | Armentrout and Kickel, 1994 | gas phase; guided ion beam CID; M |
By formula: (Fe+ • 2CH4) + CH4 = (Fe+ • 3CH4)
Enthalpy of reaction
ΔrH° (kcal/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
23.7 (+1.4,-0.) | CID | Armentrout and Kickel, 1994 | gas phase; guided ion beam CID; M |
By formula: (Fe+ • 3CH4) + CH4 = (Fe+ • 4CH4)
Enthalpy of reaction
ΔrH° (kcal/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
17.7 (+1.4,-0.) | CID | Armentrout and Kickel, 1994 | gas phase; guided ion beam CID; M |
By formula: H3O+ + CH4 = (H3O+ • CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 8.0 | kcal/mol | HPMS | Bennet and Field, 1972, 2 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 20.4 | cal/mol*K | HPMS | Bennet and Field, 1972, 2 | gas phase; M |
By formula: (H3O+ • CH4) + CH4 = (H3O+ • 2CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 3.4 | kcal/mol | HPMS | Bennet and Field, 1972, 2 | gas phase; Entropy change is questionable; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 8.1 | cal/mol*K | HPMS | Bennet and Field, 1972, 2 | gas phase; Entropy change is questionable; M |
By formula: H3S+ + CH4 = (H3S+ • CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 3.9 | kcal/mol | HPMS | Bennet and Field, 1972 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 18.1 | cal/mol*K | HPMS | Bennet and Field, 1972 | gas phase; M |
By formula: H4N+ + CH4 = (H4N+ • CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 3.6 | kcal/mol | HPMS | Bennet and Field, 1972 | gas phase; Entropy change is questionable; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 15.5 | cal/mol*K | HPMS | Bennet and Field, 1972 | gas phase; Entropy change is questionable; M |
+ = CH4I-
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 2.60 | kcal/mol | N/A | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | -2.77 | kcal/mol | TDAs | Hiraoka, Mizuno, et al., 2001 | gas phase; B |
By formula: Mg+ + CH4 = (Mg+ • CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 6.7 ± 1.6 | kcal/mol | CIDT | Andersen, Muntean, et al., 2000 | RCD |
By formula: (Mg+ • CH4) + CH4 = (Mg+ • 2CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 3.5 ± 1.6 | kcal/mol | CIDT | Andersen, Muntean, et al., 2000 | RCD |
By formula: Na+ + CH4 = (Na+ • CH4)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 7.2 | kcal/mol | HPMS | Castleman, Peterson, et al., 1983 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 14.1 | cal/mol*K | HPMS | Castleman, Peterson, et al., 1983 | gas phase; M |
Mass spectrum (electron ionization)
Go To: Top, Gas phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director
Spectrum
Additional Data
View image of digitized spectrum (can be printed in landscape orientation).
Due to licensing restrictions, this spectrum cannot be downloaded.
Owner | NIST Mass Spectrometry Data Center Collection (C) 2014 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
---|---|
Origin | D.HENNEBERG, MAX-PLANCK INSTITUTE, MULHEIM, WEST GERMANY |
NIST MS number | 61313 |
References
Go To: Top, Gas phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Chase, 1998
Chase, M.W., Jr.,
NIST-JANAF Themochemical Tables, Fourth Edition,
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Manion, 2002
Manion, J.A.,
Evaluated Enthalpies of Formation of the Stable Closed Shell C1 and C2 Chlorinated Hydrocarbons,
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Pittam and Pilcher, 1972
Pittam, D.A.; Pilcher, G.,
Measurements of heats of combustion by flame calorimetry. Part 8.-Methane, ethane, propane, n-butane and 2-methylpropane,
J. Chem. Soc. Faraday Trans. 1, 1972, 68, 2224-2229. [all data]
Prosen and Rossini, 1945
Prosen, E.J.; Rossini, F.D.,
Heats of combustion and formation of the paraffin hydrocarbons at 25° C,
J. Res. NBS, 1945, 263-267. [all data]
Roth and Banse, 1932
Roth, W.A.; Banse, H.,
Die verbrennungs- und bildungswarme von kohlenoxyd und methan,
Arch. Eisenhutten., 1932, 6, 43-46. [all data]
Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G.,
Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]
Rossini, 1931
Rossini, F.D.,
The heats of combustion of methane and carbon monoxide,
J. Res. NBS, 1931, 6, 37-49. [all data]
Colwell J.H., 1963
Colwell J.H.,
Thermodynamic properties of CH4 and CD4. Interpretation of the properties of solid,
J. Chem. Phys., 1963, 39, 635-653. [all data]
Vogt G.J., 1976
Vogt G.J.,
Entropy and heat capacity of methane; spin-species conversion,
J. Chem. Thermodyn., 1976, 8, 1011-1031. [all data]
Friend D.G., 1989
Friend D.G.,
Thermophysical properties of methane,
J. Phys. Chem. Ref. Data, 1989, 18, 583-638. [all data]
Gurvich, Veyts, et al., 1989
Gurvich, L.V.; Veyts, I.V.; Alcock, C.B.,
Thermodynamic Properties of Individual Substances, 4th ed.; Vols. 1 and 2, Hemisphere, New York, 1989. [all data]
Giauque W.F., 1931
Giauque W.F.,
The entropies of methane and ammonia,
Phys. Rev., 1931, 38, 196-197. [all data]
East A.L.L., 1997
East A.L.L.,
Ab initio statistical thermodynamical models for the computation of third-law entropies,
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Halford J.O., 1957
Halford J.O.,
Standard heat capacities of gaseous methanol, ethanol, methane and ethane at 279 K by thermal conductivity,
J. Phys. Chem., 1957, 61, 1536-1539. [all data]
McDowell R.S., 1963
McDowell R.S.,
Thermodynamic functions of methane,
J. Chem. Eng. Data, 1963, 8, 547-548. [all data]
Streng, 1971
Streng, A.G.,
Miscibility and Compatibility of Some Liquid and Solidified Gases at Low Temperature,
J. Chem. Eng. Data, 1971, 16, 357. [all data]
Van't Zelfde, Omar, et al., 1968
Van't Zelfde, P.; Omar, M.H.; LePair-Schroten, H.G.M.; Dokoupil, Z.,
Solid-liquid equilibrium diagram for the argon + methane system.,
Physica (Amsterdam), 1968, 38, 241-51. [all data]
Timmermans, 1935
Timmermans, J.,
Researches in Stoichiometry. I. The Heat of Fusion of Organic Compounds.,
Bull. Soc. Chim. Belg., 1935, 44, 17-40. [all data]
Clusius, 1929
Clusius, K.,
The specific heat of several condensed gases between 10deg. abs. and their triple point.,
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Eucken and Karwat, 1924
Eucken, A.; Karwat, E.,
Determination of the heat content of several condensed gases,
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Ambrose and Tsonopoulos, 1995
Ambrose, D.; Tsonopoulos, C.,
Vapor-Liquid Critical Properties of Elements and Compounds. 2. Normal Alkenes,
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Younglove and Ely, 1987
Younglove, B.A.; Ely, J.F.,
Thermophysical Properties of Fluids II. Methane, Ethane, Propane, Isobutane, and Normal Butane,
J. Phys. Chem. Ref. Data, 1987, 16, 577. [all data]
Terry, Lynch, et al., 1969
Terry, M.J.; Lynch, J.T.; Bunclark, M.; Mansell, K.R.; Staveley, L.A.K.,
The Densities of Liquid Argon, Krypton, Xenon, Oxygen, Nitrogen, Carbon Monoxide, Methane and Carbon Tetrafluoride Along the Orthobaric Liquid Curve,
J. Chem. Thermodyn., 1969, 1, 413. [all data]
Vogt and Pitzer, 1976
Vogt, G.J.; Pitzer, K.S.,
Entropy and heat capacity of methane, spin-species conversion,
J. Chem. Thermodynam., 1976, 8, 1011-1031. [all data]
Frank and Clusius, 1937
Frank, A.; Clusius, K.,
The entropy of methane,
Z. Physik. Chem., 1937, B36, 291-300. [all data]
Stock, Henning, et al., 2006
Stock, Alfred; Henning, Fritz; Kuß, Ernst,
Dampfdrucktafeln für Temperaturbestimmungen zwischen + 25° und - 185°,
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Boublik, Fried, et al., 1984
Boublik, T.; Fried, V.; Hala, E.,
The Vapour Pressures of Pure Substances: Selected Values of the Temperature Dependence of the Vapour Pressures of Some Pure Substances in the Normal and Low Pressure Region, 2nd ed., Elsevier, New York, 1984, 972. [all data]
Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw,
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Majer and Svoboda, 1985
Majer, V.; Svoboda, V.,
Enthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. [all data]
Ott, Goates, et al., 1972
Ott, J. Bevan; Goates, J. Rex; Lamb, John D.,
Solid-liquid phase equilibria in water + ethylene glycol,
The Journal of Chemical Thermodynamics, 1972, 4, 1, 123-126, https://doi.org/10.1016/S0021-9614(72)80015-6
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Reid, 1972
Reid, Robert C.,
Handbook on vapor pressure and heats of vaporization of hydrocarbons and related compounds, R. C. Wilhort and B. J. Zwolinski, Texas A Research Foundation. College Station, Texas(1971). 329 pages.$10.00,
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Ambrose, Counsell, et al., 1970
Ambrose, D.; Counsell, J.F.; Davenport, A.J.,
The use of Chebyshev polynomials for the representation of vapour pressures between the triple point and the critical point,
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Hestermans and White, 1961
Hestermans, P.; White, David,
THE VAPOR PRESSURE, HEAT OF VAPORIZATION AND HEAT CAPACITY OF METHANE FROM THE BOILING POINT TO THE CRITICAL TEMPERATURE,
J. Phys. Chem., 1961, 65, 2, 362-365, https://doi.org/10.1021/j100820a044
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Frank and Clusius, 1939
Frank, A.; Clusius, K.,
Z. Phys. Chem. Abt. B, 1939, 42, 395. [all data]
Prydz and Goodwin, 1972
Prydz, R.; Goodwin, R.D.,
Experimental Melting and Vapor Pressures of Methane,
J. Chem. Thermodyn., 1972, 4, 1, 127-133, https://doi.org/10.1016/S0021-9614(72)80016-8
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Regnier, 1972
Regnier, J.,
Tension de Vapeur de L'Ethane Entre 80 et 135 K,
J. Chim. Phys., 1972, 69, 942-944. [all data]
Cutler and Morrison, 1965
Cutler, A.J.B.; Morrison, J.A.,
Excess Thermodynamic Functions for Liquid Mixtures of Methane+Propane,
Trans. Faraday Soc., 1965, 61, 429-442, https://doi.org/10.1039/tf9656100429
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Bondi, 1963
Bondi, A.,
Heat of Siblimation of Molecular Crystals: A Catalog of Molecular Structure Increments.,
J. Chem. Eng. Data, 1963, 8, 3, 371-381, https://doi.org/10.1021/je60018a027
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Armstrong, Brickwedde, et al., 1955
Armstrong, George T.; Brickwedde, F.G.; Scott, R.B.,
Vapor pressures of the methanes,
J. RES. NATL. BUR. STAN., 1955, 55, 1, 39, https://doi.org/10.6028/jres.055.005
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Jones, 1960
Jones, A.H.,
Sublimation Pressure Data for Organic Compounds.,
J. Chem. Eng. Data, 1960, 5, 2, 196-200, https://doi.org/10.1021/je60006a019
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Tickner and Lossing, 1951
Tickner, A.W.; Lossing, F.P.,
The Measurement of Low Vapor Pressures by Means of a Mass Spectrometer.,
J. Phys. Chem., 1951, 55, 5, 733-740, https://doi.org/10.1021/j150488a013
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Stull, 1947
Stull, Daniel R.,
Vapor Pressure of Pure Substances. Organic and Inorganic Compounds,
Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022
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Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G.,
Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update,
J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018
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Berkowitz, Greene, et al., 1987
Berkowitz, J.; Greene, J.P.; Cho, H.; Ruscic, B.,
The ionization potentials of CH4 and CD4,
J. Chem. Phys., 1987, 86, 674. [all data]
Chatham, Hils, et al., 1984
Chatham, H.; Hils, D.; Robertson, R.; Gallagher, A.,
Total and partial electron collisional ionization cross sections for CH4, C2H6, SiH4, and Si2H6,
J. Chem. Phys., 1984, 81, 1770. [all data]
Plessis, Marmet, et al., 1983
Plessis, P.; Marmet, P.; Dutil, R.,
Ionization and appearance potentials of CH4 by electron impact,
J. Phys. B:, 1983, 16, 1283. [all data]
Kimura, Katsumata, et al., 1981
Kimura, K.; Katsumata, S.; Achiba, Y.; Yamazaki, T.; Iwata, S.,
Ionization energies, Ab initio assignments, and valence electronic structure for 200 molecules
in Handbook of HeI Photoelectron Spectra of Fundamental Organic Compounds, Japan Scientific Soc. Press, Tokyo, 1981. [all data]
Bieri, Burger, et al., 1977
Bieri, G.; Burger, F.; Heilbronner, E.; Maier, J.P.,
Valence ionization enrgies of hydrocarbons,
Helv. Chim. Acta, 1977, 60, 2213. [all data]
Selim and El-Kholy, 1975
Selim, E.T.M.; El-Kholy, S.B.,
Mass spectrometric ionization and dissociation of methane,
Indian J. Pure Appl. Phys., 1975, 13, 233. [all data]
Debies and Rabalais, 1975
Debies, T.P.; Rabalais, J.W.,
Calculated photoionization cross-sections and angular distributions for the isoelectronic series Ne, HF, H2O, NH3, and CH4,
J. Am. Chem. Soc., 1975, 97, 487. [all data]
Rabalais, Debies, et al., 1974
Rabalais, J.W.; Debies, T.P.; Berkosky, J.L.; Huang, J.-T.J.; Ellison, F.O.,
Calculated photoionization cross sections relative experimental photoionization intensities for a selection of small molecules,
J. Chem. Phys., 1974, 61, 516. [all data]
Morrison and Traeger, 1973
Morrison, J.D.; Traeger, J.C.,
Ionization and dissociation by electron impact. III. CH4 and SiH4,
Int. J. Mass Spectrom. Ion Phys., 1973, 11, 289. [all data]
Potts and Price, 1972
Potts, A.W.; Price, W.C.,
The photoelectron spectra of methane, silane germane and stannane,
Proc. R. Soc. London A:, 1972, 165. [all data]
Finney and Harrison, 1972
Finney, C.D.; Harrison, A.G.,
A third-derivative method for determining electron-impact onset potentials,
Int. J. Mass Spectrom. Ion Phys., 1972, 9, 221. [all data]
Bergmark, Rabalais, et al., 1972
Bergmark, T.; Rabalais, J.W.; Werme, L.O.; Karlsson, L.; Siegbahn, K.,
High-resolution electron spectra of methane, thiophene, 2-bromothiphene, and 3-bromothiophene
in Electron Spectroscopy, ed. D.A. Shirley (North-Holland Pub. Co., Amsterdam), 1972. [all data]
Rabalais, Bergmark, et al., 1971
Rabalais, J.W.; Bergmark, T.; Werme, L.O.; Karlsson, L.; Siegbahn, K.,
The Jahn-Teller effect in the electron spectrum of methane,
Phys. Scr., 1971, 3, 13. [all data]
Chupka and Berkowitz, 1971
Chupka, W.A.; Berkowitz, J.,
Photoionization of methane: ionization potential and proton affinity of CH4,
J. Chem. Phys., 1971, 54, 4256. [all data]
Pullen, Carlson, et al., 1970
Pullen, B.P.; Carlson, T.A.; Moddeman, W.E.; Schweitzer, G.K.; Bull, W.E.,
Photoelectron spectra of methane, silane, germane, methyl fluoride, difluoromethane, and trifluoromethane,
J. Chem. Phys., 1970, 53, 768. [all data]
Brundle, Robin, et al., 1970
Brundle, C.R.; Robin, M.B.; Basch, H.,
Electronic energies and electronic structures of the fluoromethanes,
J. Chem. Phys., 1970, 53, 2196. [all data]
Lossing and Semeluk, 1969
Lossing, F.P.; Semeluk, G.P.,
Threshold ionization efficiency curves for monoenergetic electron impact on H2, D2, CH4 and CD4,
Intern. J. Mass Spectrom. Ion Phys., 1969, 2, 408. [all data]
Williams and Hamill, 1968
Williams, J.M.; Hamill, W.H.,
Ionization potentials of molecules and free radicals and appearance potentials by electron impact in the mass spectrometer,
J. Chem. Phys., 1968, 49, 4467. [all data]
Villarejo, Stockbauer, et al., 1968
Villarejo, D.; Stockbauer, R.; Inghram, M.G.,
Measurement of threshold electrons in the photoionization of small molecules,
Bull. Am. Phys. Soc., 1968, 13, 39. [all data]
Cermak, 1968
Cermak, V.,
Penning ionization electron spectroscopy. I. Determination of ionization potentials of polyatomic molecules,
Collection Czech. Chem. Commun., 1968, 33, 2739. [all data]
Baker, Baker, et al., 1968
Baker, A.D.; Baker, C.; Brundle, C.R.; Turner, D.W.,
The electronic structures of methane, ethane, ethylene and formaldehyde studied by high-resolution molecular photoelectron spectroscopy,
Intern. J. Mass Spectrom. Ion Phys., 1968, 1, 285. [all data]
Brehm, 1966
Brehm, B.,
Massenspektrometrische Untersuchung der Photoionisation von Molekulen,
Z. Naturforsch., 1966, 21a, 196. [all data]
Nicholson, 1965
Nicholson, A.J.C.,
Photoionization-efficiency curves. II. False and genuine structure,
J. Chem. Phys., 1965, 43, 1171. [all data]
Dibeler, Krauss, et al., 1965
Dibeler, V.H.; Krauss, M.; Reese, R.M.; Harllee, F.N.,
Mass-spectrometric study of photoionization. III. Methane and methane-d4,
J. Chem. Phys., 1965, 42, 3791. [all data]
Melton and Hamill, 1964
Melton, C.E.; Hamill, W.H.,
Appearance potentials by the retarding potential-difference method for secondary ions produced by excited-neutral, excited ion-neutral, and ion-neutral reactions,
J. Chem. Phys., 1964, 41, 1469. [all data]
Bieri and Asbrink, 1980
Bieri, G.; Asbrink, L.,
30.4-nm He(II) photoelectron spectra of organic molecules,
J. Electron Spectrosc. Relat. Phenom., 1980, 20, 149. [all data]
Harshbarger, Robin, et al., 1973
Harshbarger, W.R.; Robin, M.B.; Lassettre, E.N.,
The electron impact spectra of the fluoromethanes,
J. Electron Spectrosc. Relat. Phenom., 1973, 1, 319. [all data]
McCulloh and Dibeler, 1976
McCulloh, K.E.; Dibeler, V.H.,
Enthalpy of formation of methyl and methylene radicals of photoionization studies of methane and ketene,
J. Chem. Phys., 1976, 64, 4445. [all data]
Chupka, 1968
Chupka, W.A.,
Mass-spectrometric study of the photoionization of methane,
J. Chem. Phys., 1968, 48, 2337. [all data]
Stockbauer, 1977
Stockbauer, R.,
A threshold photoelectron-photoion coincidence mass spectrometer for measureing ion kinetic energy release on fragmentation,
Int. J. Mass Spectrom. Ion Processes, 1977, 25, 89. [all data]
Lossing and Semeluk, 1970
Lossing, F.P.; Semeluk, G.P.,
Free radicals by mass spectrometry. XLII.Ionization potentials and ionic heats of formation for C1-C4 alkyl radicals,
Can. J. Chem., 1970, 48, 955. [all data]
Locht, Olivier, et al., 1979
Locht, R.; Olivier, J.L.; Momigny, J.,
Dissociative autoionization as a mechanism for the proton formation from methane and methane-d4 by low energy electron impact,
Chem. Phys., 1979, 43, 425. [all data]
Appell and Kubach, 1971
Appell, J.; Kubach, C.,
On the formation of energetic protons by electron impact on methane,
Chem. Phys. Lett., 1971, 11, 486. [all data]
Ellison, Engelking, et al., 1978
Ellison, G.B.; Engelking, P.C.; Lineberger, W.C.,
An experimental determination of the geometry and electron affinity of CH3,
J. Am. Chem. Soc., 1978, 100, 2556. [all data]
Graul and Squires, 1990
Graul, S.T.; Squires, R.R.,
Gas-Phase Acidities Derived from Threshold Energies for Activated Reactions,
J. Am. Chem. Soc., 1990, 112, 7, 2517, https://doi.org/10.1021/ja00163a007
. [all data]
Bohme, Lee-Ruff, et al., 1972
Bohme, D.K.; Lee-Ruff, E.; Young, L.B.,
Acidity order of selected bronsted acids in the gas phase at 300K,
J. Am. Chem. Soc., 1972, 94, 5153. [all data]
Check, Faust, et al., 2001
Check, C.E.; Faust, T.O.; Bailey, J.M.; Wright, B.J.; Gilbert, T.M.; Sunderlin, L.S.,
Addition of Polarization and Diffuse Functions to the LANL2DZ Basis Set for P-Block Elements,
J. Phys. Chem. A,, 2001, 105, 34, 8111, https://doi.org/10.1021/jp011945l
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Hiraoka, Mizuno, et al., 2001
Hiraoka, K.; Mizuno, T.; Iino, T.; Eguchi, D.; Yamabe, S.,
Characteristic changes of bond energies for gas-phase cluster ions of halide ions with methane and chloromethanes,
J. Phys. Chem. A, 2001, 105, 20, 4887-4893, https://doi.org/10.1021/jp010143n
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Bennet and Field, 1972
Bennet, S.L.; Field, F.H.,
Reversible Reactions of Gaseous Ions. VI. The NH3 - CH4, H2S - CH4 and CF4 - CH4 Systems at Low Temperatures,
J. Am. Chem. Soc., 1972, 94, 18, 6305, https://doi.org/10.1021/ja00773a009
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Hiraoka and Mori, 1989
Hiraoka, K.; Mori, T.,
Gas - Phase Stability and Structure of Cluster Ions CH5+(CH4)n with n = 1 - 9,
Chem. Phys. Lett., 1989, 161, 2, 111, https://doi.org/10.1016/0009-2614(89)85040-7
. [all data]
Hiraoka and Kebarle, 1975
Hiraoka, K.; Kebarle, P.,
Energetics, Stabilities and Possible Structures of CH5+(CH4)n Clusters from Gas Phase Study of Equilibria CH5+(CH4)n - 1 + CH4 = CH5+(CH4)n for n = 1 - 5,
J. Am. Chem. Soc., 1975, 97, 15, 4179, https://doi.org/10.1021/ja00848a005
. [all data]
Field and Beggs, 1971
Field, F.H.; Beggs, D.P.,
Reversible Reactions of Gas Phase Ions. III. Studies with Methane at 0.1-1.0 Torr and 77-300 K,
J. Am. Chem. Soc., 1971, 93, 7, 1585, https://doi.org/10.1021/ja00736a003
. [all data]
Hiraoka, Mori, et al., 1993
Hiraoka, K.; Mori, T.; Yamabe, S.,
The Gas-Phase Solvation of C2H5+, s-C3H7+ and s-C4H9+ with CH4. The Isomeric Structures of C2H5+ and C2H5+.CH4,
Chem. Phys. Lett., 1993, 207, 2-3, 178, https://doi.org/10.1016/0009-2614(93)87011-Q
. [all data]
Hiroka and Kebarle, 1975
Hiroka, K.; Kebarle, P.,
Information on the Proton Affinity and Protolysis of Propane from Measurement of the Ion Cluster Equilibrium: C2H5+ + CH4 = C3H9+,
Can. J. Phys., 1975, 53, 970. [all data]
Hiraoka and Kebarle, 1976
Hiraoka, K.; Kebarle, P.,
Stabilities and Energetics of Pentacoordinated Carbonium Ions. The Isomeric C2H7+ Ions and Some Higher Analogues: C3H9+ and C4H11+,
J. Am. Chem. Soc., 1976, 98, 20, 6119, https://doi.org/10.1021/ja00436a009
. [all data]
Hop and McMahon, 1991
Hop, C.E.C.A.; McMahon, T.B.,
Observation of a Weakly Bound Mn(CO)5+/CH4 Complex,
J. Am. Chem. Soc., 1991, 113, 1, 355, https://doi.org/10.1021/ja00001a050
. [all data]
Kemper, Bushnell, et al., 1993
Kemper, P.R.; Bushnell, J.; Von Koppen, P.; Bowers, M.T.,
Binding Energies of Co+(H2/CH4/C2H6)1,2,3 Clusters,
J. Phys. Chem., 1993, 97, 9, 1810, https://doi.org/10.1021/j100111a016
. [all data]
Haynes and Armentrout, 1996
Haynes, C.L.; Armentrout, P.B.,
Guided Ion Beam Determination of the Co+ - H2 Bond Dissociation energy,
Chem Phys. Let., 1996, 249, 1-2, 64, https://doi.org/10.1016/0009-2614(95)01337-7
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Armentrout and Kickel, 1994
Armentrout, P.B.; Kickel, B.L.,
Gas Phase Thermochemistry of Transition Metal Ligand Systems: Reassessment of Values and Periodic Trends, in Organometallic Ion Chemistry, B. S. Freiser, ed, 1994. [all data]
Kemper, Bushnell, et al., 1993, 2
Kemper, P.R.; Bushnell, J.; Von Helden, G.; Bowers, M.T.,
Co+(H2)n Clusters: Binding Energies and Molecular Parameters,
J. Chem Phys., 1993, 97, 1, 52, https://doi.org/10.1021/j100103a012
. [all data]
Bennet and Field, 1972, 2
Bennet, S.L.; Field, F.H.,
Reversible Reactions of Gaseous Ions. V. The Methane - Water System at Low Temperatures,
J. Am. Chem. Soc., 1972, 94, 15, 5188, https://doi.org/10.1021/ja00770a008
. [all data]
Andersen, Muntean, et al., 2000
Andersen, A.; Muntean, F.; Walter, D.; Rue, C.; Armentrout, P.B.,
Collision-Induced Dissociation and Theoretical Studies of Mg+ Complexes with CO, CO2, NH3, CH4, CH3OH, and C6H6,
J. Phys. Chem. A, 2000, 104, 4, 692, https://doi.org/10.1021/jp993031t
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Castleman, Peterson, et al., 1983
Castleman, A.W.; Peterson, K.I.; Upschulte, B.L.; Schelling, F.J.,
Energetics and Structure of Na+ Cluster Ions,
Int. J. Mass Spectrom. Ion Phys., 1983, 47, 203, https://doi.org/10.1016/0020-7381(83)87171-X
. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), References
- Symbols used in this document:
AE Appearance energy Cp,gas Constant pressure heat capacity of gas IE (evaluated) Recommended ionization energy Pc Critical pressure Ptriple Triple point pressure S°gas Entropy of gas at standard conditions S°gas,1 bar Entropy of gas at standard conditions (1 bar) T Temperature Tboil Boiling point Tc Critical temperature Tfus Fusion (melting) point Ttriple Triple point temperature Vc Critical volume d(ln(kH))/d(1/T) Temperature dependence parameter for Henry's Law constant k°H Henry's Law constant at 298.15K ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition ΔcH°gas Enthalpy of combustion of gas at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔrS° Entropy of reaction at standard conditions ΔsubH Enthalpy of sublimation ΔvapH Enthalpy of vaporization ΔvapS Entropy of vaporization ρc Critical density - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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