Methylamine
- Formula: CH5N
- Molecular weight: 31.0571
- IUPAC Standard InChIKey: BAVYZALUXZFZLV-UHFFFAOYSA-N
- CAS Registry Number: 74-89-5
- 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. - Isotopologues:
- Other names: Methanamine; Aminomethane; Carbinamine; Monomethylamine; CH3NH2; Mercurialin; Methylaminen; Metilamine; Metyloamina; UN 1061; MMA
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Gas phase thermochemistry data
Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, 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: Donald R. Burgess, Jr.
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°gas | -5.62 | kcal/mol | N/A | Aston, Siller, et al., 1937 | Value computed using ΔfHliquid° value of -47.3±0.46 kj/mol from Aston, Siller, et al., 1937 and ΔvapH° value of 23.85 kj/mol from missing citation. |
ΔfH°gas | -2.92 | kcal/mol | N/A | Lemoult, 1907 | Value computed using ΔfHliquid° value of -36 kj/mol from Lemoult, 1907 and ΔvapH° value of 23.85 kj/mol from missing citation. |
Condensed phase thermochemistry data
Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, 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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔfH°liquid | -11.3 ± 0.11 | kcal/mol | N/A | Cox and Pilcher, 1970 | Review; Unpublished work J. Jaffe; ALS |
ΔfH°liquid | -11.3 ± 0.11 | kcal/mol | Ccb | Aston, Siller, et al., 1937 | Unpublished work J. Jaffe; ALS |
ΔfH°liquid | -8.7 | kcal/mol | Ccb | Lemoult, 1907 | ALS |
Quantity | Value | Units | Method | Reference | Comment |
ΔcH°liquid | -253.54 ± 0.09 | kcal/mol | N/A | Cox and Pilcher, 1970 | Review; Unpublished work J. Jaffe; ALS |
ΔcH°liquid | -253.54 ± 0.09 | kcal/mol | Ccb | Aston, Siller, et al., 1937 | Unpublished work J. Jaffe; ALS |
ΔcH°liquid | -261.4 | kcal/mol | Ccb | Muller, 1910 | At 288 K; ALS |
ΔcH°liquid | -256.9 | kcal/mol | Ccb | Lemoult, 1907 | ALS |
Quantity | Value | Units | Method | Reference | Comment |
S°liquid | 35.90 | cal/mol*K | N/A | Aston, Siller, et al., 1937, 2 | For superheated liquid, using extrapolated heat capacities.; DH |
Constant pressure heat capacity of liquid
Cp,liquid (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
24.331 | 259.28 | Aston, Siller, et al., 1937, 2 | T = 14 to 259 K. Value is unsmoothed experimental datum.; DH |
Phase change data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, 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
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
Tboil | 266.8 ± 0.3 | K | AVG | N/A | Average of 8 values; Individual data points |
Quantity | Value | Units | Method | Reference | Comment |
Tfus | 180.05 | K | N/A | Roberts, Emeleus, et al., 1939 | Uncertainty assigned by TRC = 0.4 K; TRC |
Tfus | 180.05 | K | N/A | Emeleus and Briscoe, 1937 | Uncertainty assigned by TRC = 0.3 K; TRC |
Tfus | 179.7 | K | N/A | McNeight and Smyth, 1936 | Uncertainty assigned by TRC = 0.07 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Ttriple | 179.7 | K | N/A | Aston, Siller, et al., 1937, 3 | Uncertainty assigned by TRC = 0.07 K; T0/K=273.16; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Tc | 430.85 | K | N/A | Li and Kiran, 1988 | Uncertainty assigned by TRC = 0.5 K; TRC |
Tc | 430.7 | K | N/A | Kay and Young, 1974 | Uncertainty assigned by TRC = 0.2 K; TRC |
Tc | 430.05 | K | N/A | Berthoud, 1917 | Uncertainty assigned by TRC = 0.7 K; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Pc | 75.50 | atm | N/A | Li and Kiran, 1988 | Uncertainty assigned by TRC = 0.987 atm; TRC |
Pc | 75.14 | atm | N/A | Kay and Young, 1974 | Uncertainty assigned by TRC = 0.04 atm; TRC |
Pc | 73.6000 | atm | N/A | Berthoud, 1917 | Uncertainty assigned by TRC = 0.6000 atm; TRC |
Quantity | Value | Units | Method | Reference | Comment |
Vc | 0.1385 | l/mol | N/A | Li and Kiran, 1988 | Uncertainty assigned by TRC = 0.001 l/mol; TRC |
Quantity | Value | Units | Method | Reference | Comment |
ΔvapH° | 5.700 | kcal/mol | N/A | Majer and Svoboda, 1985 |
Enthalpy of vaporization
ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
---|---|---|---|---|
6.1690 | 266.84 | N/A | Aston, Siller, et al., 1937, 2 | DH |
6.12 | 266.8 | N/A | Majer and Svoboda, 1985 | |
5.93 | 334. | A | Stephenson and Malanowski, 1987 | Based on data from 319. to 381. K.; AC |
5.62 | 388. | A | Stephenson and Malanowski, 1987 | Based on data from 373. to 430. K.; AC |
6.24 | 278. | A | Stephenson and Malanowski, 1987 | Based on data from 263. to 329. K.; AC |
6.50 | 258. | A | Stephenson and Malanowski, 1987 | Based on data from 223. to 273. K. See also Dykyj, 1970.; AC |
6.169 ± 0.030 | 266.84 | V | Aston, Siller, et al., 1937 | ALS |
6.55 | 252. | N/A | Aston, Siller, et al., 1937, 2 | Based on data from 190. to 267. K. See also Boublik, Fried, et al., 1984.; AC |
Entropy of vaporization
ΔvapS (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
23.12 | 266.84 | Aston, Siller, et al., 1937, 2 | 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 |
---|---|---|---|---|---|
190.06 to 266.92 | 4.514 | 1034.977 | -37.574 | Aston, Siller, et al., 1937, 2 | Coefficents calculated by NIST from author's data. |
Enthalpy of fusion
ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
---|---|---|---|
1.466 | 179.70 | Aston, Siller, et al., 1937, 2 | DH |
1.47 | 179.7 | Domalski and Hearing, 1996 | AC |
Entropy of fusion
ΔfusS (cal/mol*K) | Temperature (K) | Reference | Comment |
---|---|---|---|
8.157 | 179.70 | Aston, Siller, et al., 1937, 2 | DH |
Reaction thermochemistry data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, 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:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
RCD - Robert C. Dunbar
B - John E. Bartmess
MS - José A. Martinho Simões
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
By formula: Li+ + CH5N = (Li+ • CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 41.1 | kcal/mol | ICR | Woodin and Beauchamp, 1978 | gas phase; switching reaction(Li+)H2O, Entropy change calculated or estimated; Dzidic and Kebarle, 1970 interpolated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 26. | cal/mol*K | N/A | Woodin and Beauchamp, 1978 | gas phase; switching reaction(Li+)H2O, Entropy change calculated or estimated; Dzidic and Kebarle, 1970 interpolated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 33.3 | kcal/mol | ICR | Woodin and Beauchamp, 1978 | gas phase; switching reaction(Li+)H2O, Entropy change calculated or estimated; Dzidic and Kebarle, 1970 interpolated; M |
By formula: C3H9Sn+ + CH5N = (C3H9Sn+ • CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 42.1 | kcal/mol | PHPMS | Stone and Splinter, 1984 | gas phase; switching reaction((CH3)3Sn+)CH3OH, Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 30.7 | cal/mol*K | N/A | Stone and Splinter, 1984 | gas phase; switching reaction((CH3)3Sn+)CH3OH, Entropy change calculated or estimated; M |
Free energy of reaction
ΔrG° (kcal/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
26.0 | 525. | PHPMS | Stone and Splinter, 1984 | gas phase; switching reaction((CH3)3Sn+)CH3OH, Entropy change calculated or estimated; M |
By formula: K+ + CH5N = (K+ • CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 19.1 | kcal/mol | HPMS | Davidson and Kebarle, 1976 | gas phase; switching reaction(K+)H2O; Davidson and Kebarle, 1976, 2; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 21.8 | cal/mol*K | HPMS | Davidson and Kebarle, 1976 | gas phase; switching reaction(K+)H2O; Davidson and Kebarle, 1976, 2; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 12.7 | kcal/mol | HPMS | Davidson and Kebarle, 1976 | gas phase; switching reaction(K+)H2O; Davidson and Kebarle, 1976, 2; M |
By formula: Na+ + CH5N = (Na+ • CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 26.3 ± 0.2 | kcal/mol | HPMS | Hoyau, Norrman, et al., 1999 | RCD |
ΔrH° | 32.1 | kcal/mol | HPMS | Guo and Castleman, 1990 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 22600. | cal/mol*K | HPMS | Hoyau, Norrman, et al., 1999 | RCD |
ΔrS° | 30.3 | cal/mol*K | HPMS | Guo and Castleman, 1990 | gas phase; M |
Free energy of reaction
ΔrG° (kcal/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
19.5 | 298. | IMRE | McMahon and Ohanessian, 2000 | Anchor alanine=39.89; RCD |
By formula: (CH6N+ • 2CH5N) + CH5N = (CH6N+ • 3CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 13.4 | kcal/mol | PHPMS | Meot-Ner (Mautner), 1992 | gas phase; M |
ΔrH° | 17.0 | kcal/mol | HPMS | Holland and Castleman, 1982 | gas phase; Entropy change is questionable; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 25.1 | cal/mol*K | PHPMS | Meot-Ner (Mautner), 1992 | gas phase; M |
ΔrS° | 41.6 | cal/mol*K | HPMS | Holland and Castleman, 1982 | gas phase; Entropy change is questionable; M |
By formula: (CH6N+ • CH5N) + CH5N = (CH6N+ • 2CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 16.0 | kcal/mol | PHPMS | Meot-Ner (Mautner), 1992 | gas phase; M |
ΔrH° | 19.2 | kcal/mol | HPMS | Holland and Castleman, 1982 | gas phase; Entropy change is questionable; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 22.9 | cal/mol*K | PHPMS | Meot-Ner (Mautner), 1992 | gas phase; M |
ΔrS° | 39.9 | cal/mol*K | HPMS | Holland and Castleman, 1982 | gas phase; Entropy change is questionable; M |
CH4N- + =
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 402.0 ± 2.6 | kcal/mol | D-EA | Radisic, Xu, et al., 2002 | gas phase; B |
ΔrH° | 403.21 ± 0.82 | kcal/mol | G+TS | MacKay, Hemsworth, et al., 1976 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 394.5 ± 2.7 | kcal/mol | H-TS | Radisic, Xu, et al., 2002 | gas phase; B |
ΔrG° | 395.70 ± 0.70 | kcal/mol | IMRE | MacKay, Hemsworth, et al., 1976 | gas phase; B |
By formula: C3H9Si+ + CH5N = (C3H9Si+ • CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 55.4 | kcal/mol | PHPMS | Li and Stone, 1990 | gas phase; switching reaction,Thermochemical ladder((CH3)3Si+)C6H5COOC2H5; Wojtyniak and Stone, 1986; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 38.1 | cal/mol*K | PHPMS | Li and Stone, 1990 | gas phase; switching reaction,Thermochemical ladder((CH3)3Si+)C6H5COOC2H5; Wojtyniak and Stone, 1986; M |
By formula: CH6N+ + CH5N = (CH6N+ • CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 25.4 | kcal/mol | PHPMS | Meot-Ner (Mautner), 1992 | gas phase; M |
ΔrH° | 21.7 | kcal/mol | PHPMS | Yamdagni and Kebarle, 1973 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 27.3 | cal/mol*K | PHPMS | Meot-Ner (Mautner), 1992 | gas phase; M |
ΔrS° | 23.6 | cal/mol*K | PHPMS | Yamdagni and Kebarle, 1973 | gas phase; M |
By formula: C6H12NO3+ + CH5N = (C6H12NO3+ • CH5N)
Bond type: Hydrogen bonds with polydentate bonding in positive ions
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 28.6 | kcal/mol | PHPMS | Meot-Ner, 1984 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 19.9 | cal/mol*K | PHPMS | Meot-Ner, 1984 | gas phase; M |
By formula: (Pb+ • CH5N) + CH5N = (Pb+ • 2CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 19.1 ± 0.2 | kcal/mol | HPMS | Guo and Castleman, 1990 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 19.5 | cal/mol*K | HPMS | Guo and Castleman, 1990 | gas phase; M |
By formula: Pb+ + CH5N = (Pb+ • CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 35.4 ± 0.3 | kcal/mol | HPMS | Guo and Castleman, 1990 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 30.0 | cal/mol*K | HPMS | Guo and Castleman, 1990 | gas phase; M |
By formula: (CH6N+ • 3CH5N) + CH5N = (CH6N+ • 4CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 7.8 | kcal/mol | PHPMS | Meot-Ner (Mautner), 1992 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 21.5 | cal/mol*K | PHPMS | Meot-Ner (Mautner), 1992 | gas phase; M |
By formula: C2H8N+ + CH5N = (C2H8N+ • CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 22.4 | kcal/mol | PHPMS | Yamdagni and Kebarle, 1973 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 29.2 | cal/mol*K | PHPMS | Yamdagni and Kebarle, 1973 | gas phase; M |
C5H11BrMg (solution) + (solution) = CH4BrMgN (solution) + (solution)
By formula: C5H11BrMg (solution) + CH5N (solution) = CH4BrMgN (solution) + C5H12 (solution)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -31.19 ± 0.60 | kcal/mol | RSC | Holm, 1983 | solvent: Diethyl ether; MS |
By formula: 2CH5N = C2H7N + H3N
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -4.70 | kcal/mol | Eqk | Issoire and Long, 1960 | gas phase; ALS |
By formula: 2C2H7N = CH5N + C3H9N
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | -3.15 | kcal/mol | Eqk | Issoire and Long, 1960 | gas phase; ALS |
Henry's Law data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, 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 |
---|---|---|---|---|
140. | Q | N/A | missing citation gives missing citation as the source for the data. However, no data was found in that reference. | |
36. | 2600. | L | N/A | |
89. | M | N/A |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, 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 CH5N+ (ion structure unspecified)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
IE (evaluated) | 8.9 ± 0.1 | eV | N/A | N/A | L |
Quantity | Value | Units | Method | Reference | Comment |
Proton affinity (review) | 214.9 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Quantity | Value | Units | Method | Reference | Comment |
Gas basicity | 206.6 | kcal/mol | N/A | Hunter and Lias, 1998 | HL |
Ionization energy determinations
IE (eV) | Method | Reference | Comment |
---|---|---|---|
8.9 | PE | Aue and Bowers, 1979 | LLK |
9.45 | EI | Baldwin, Loudon, et al., 1977 | LLK |
8.9 ± 0.1 | PE | Aue, Webb, et al., 1976 | LLK |
9.08 | PE | Vovna and Vilesov, 1974 | LLK |
8.80 ± 0.02 | PE | Maier and Turner, 1973 | LLK |
9.65 | PE | Elbel, Dieck, et al., 1982 | Vertical value; LBLHLM |
9.0 | PE | Bieri, Asbrink, et al., 1982 | Vertical value; LBLHLM |
9.58 | PE | Utsunomiya, Kobayashi, et al., 1980 | Vertical value; LLK |
9.58 | PE | Kobayashi, 1978 | Vertical value; LLK |
9.64 | PE | Kimura and Osafune, 1975 | Vertical value; LLK |
9.64 | PE | Katsumata, Iwai, et al., 1973 | Vertical value; LLK |
9.65 | PE | Ogata, Onizuka, et al., 1972 | Vertical value; LLK |
Appearance energy determinations
Ion | AE (eV) | Other Products | Method | Reference | Comment |
---|---|---|---|---|---|
CH2N+ | 15.2 ± 0.3 | H2+H | EI | Collin and Franskin, 1966 | RDSH |
CH2N+[CNH2+] | 14.0 ± 0.4 | ? | EI | Burgers, Holmes, et al., 1984 | LBLHLM |
CH3+ | 14.5 | NH2 | EI | SenSharma and Franklin, 1973 | LLK |
CH3+ | 14.7 | NH2 | EI | Haney and Franklin, 1968 | RDSH |
CH3N+ | 13.3 ± 0.2 | H2 | EI | Collin and Franskin, 1966 | RDSH |
CH4N+ | 10.18 | H | EI | Lossing, Lam, et al., 1981 | LLK |
CH4N+ | 10.70 | H | EI | Loudon and Webb, 1977 | LLK |
CH4N+ | 10.55 | H | EI | Loudon and Webb, 1977 | LLK |
CH4N+ | 10.82 ± 0.15 | H | EI | Collin and Franskin, 1966 | RDSH |
CH4N+ | 10.3 ± 0.1 | H | EI | Taft, Martin, et al., 1965 | RDSH |
CH5N+ | 8.99 | ? | PI | Cornford, Frost, et al., 1971 | LLK |
CH5N+ | 9.29 | ? | CTS | Slifkin and Allison, 1967 | RDSH |
CH5N+ | 9.36 ± 0.02 | ? | EI | Collin and Franskin, 1966 | RDSH |
CH5N+ | 8.97 ± 0.02 | ? | PI | Watanabe and Mottl, 1957 | RDSH |
H2N+ | 15.9 | CH3 | EI | SenSharma and Franklin, 1973 | LLK |
NH2+ | 15.7 | CH3 | EI | Haney and Franklin, 1968 | RDSH |
De-protonation reactions
CH4N- + =
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 402.0 ± 2.6 | kcal/mol | D-EA | Radisic, Xu, et al., 2002 | gas phase; B |
ΔrH° | 403.21 ± 0.82 | kcal/mol | G+TS | MacKay, Hemsworth, et al., 1976 | gas phase; B |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 394.5 ± 2.7 | kcal/mol | H-TS | Radisic, Xu, et al., 2002 | gas phase; B |
ΔrG° | 395.70 ± 0.70 | kcal/mol | IMRE | MacKay, Hemsworth, et al., 1976 | gas phase; B |
Ion clustering data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, 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:
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
By formula: CH6N+ + CH5N = (CH6N+ • CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 25.4 | kcal/mol | PHPMS | Meot-Ner (Mautner), 1992 | gas phase; M |
ΔrH° | 21.7 | kcal/mol | PHPMS | Yamdagni and Kebarle, 1973 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 27.3 | cal/mol*K | PHPMS | Meot-Ner (Mautner), 1992 | gas phase; M |
ΔrS° | 23.6 | cal/mol*K | PHPMS | Yamdagni and Kebarle, 1973 | gas phase; M |
By formula: (CH6N+ • CH5N) + CH5N = (CH6N+ • 2CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 16.0 | kcal/mol | PHPMS | Meot-Ner (Mautner), 1992 | gas phase; M |
ΔrH° | 19.2 | kcal/mol | HPMS | Holland and Castleman, 1982 | gas phase; Entropy change is questionable; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 22.9 | cal/mol*K | PHPMS | Meot-Ner (Mautner), 1992 | gas phase; M |
ΔrS° | 39.9 | cal/mol*K | HPMS | Holland and Castleman, 1982 | gas phase; Entropy change is questionable; M |
By formula: (CH6N+ • 2CH5N) + CH5N = (CH6N+ • 3CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 13.4 | kcal/mol | PHPMS | Meot-Ner (Mautner), 1992 | gas phase; M |
ΔrH° | 17.0 | kcal/mol | HPMS | Holland and Castleman, 1982 | gas phase; Entropy change is questionable; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 25.1 | cal/mol*K | PHPMS | Meot-Ner (Mautner), 1992 | gas phase; M |
ΔrS° | 41.6 | cal/mol*K | HPMS | Holland and Castleman, 1982 | gas phase; Entropy change is questionable; M |
By formula: (CH6N+ • 3CH5N) + CH5N = (CH6N+ • 4CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 7.8 | kcal/mol | PHPMS | Meot-Ner (Mautner), 1992 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 21.5 | cal/mol*K | PHPMS | Meot-Ner (Mautner), 1992 | gas phase; M |
By formula: C2H8N+ + CH5N = (C2H8N+ • CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 22.4 | kcal/mol | PHPMS | Yamdagni and Kebarle, 1973 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 29.2 | cal/mol*K | PHPMS | Yamdagni and Kebarle, 1973 | gas phase; M |
By formula: C3H9Si+ + CH5N = (C3H9Si+ • CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 55.4 | kcal/mol | PHPMS | Li and Stone, 1990 | gas phase; switching reaction,Thermochemical ladder((CH3)3Si+)C6H5COOC2H5; Wojtyniak and Stone, 1986; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 38.1 | cal/mol*K | PHPMS | Li and Stone, 1990 | gas phase; switching reaction,Thermochemical ladder((CH3)3Si+)C6H5COOC2H5; Wojtyniak and Stone, 1986; M |
By formula: C3H9Sn+ + CH5N = (C3H9Sn+ • CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 42.1 | kcal/mol | PHPMS | Stone and Splinter, 1984 | gas phase; switching reaction((CH3)3Sn+)CH3OH, Entropy change calculated or estimated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 30.7 | cal/mol*K | N/A | Stone and Splinter, 1984 | gas phase; switching reaction((CH3)3Sn+)CH3OH, Entropy change calculated or estimated; M |
Free energy of reaction
ΔrG° (kcal/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
26.0 | 525. | PHPMS | Stone and Splinter, 1984 | gas phase; switching reaction((CH3)3Sn+)CH3OH, Entropy change calculated or estimated; M |
By formula: C6H12NO3+ + CH5N = (C6H12NO3+ • CH5N)
Bond type: Hydrogen bonds with polydentate bonding in positive ions
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 28.6 | kcal/mol | PHPMS | Meot-Ner, 1984 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 19.9 | cal/mol*K | PHPMS | Meot-Ner, 1984 | gas phase; M |
By formula: K+ + CH5N = (K+ • CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 19.1 | kcal/mol | HPMS | Davidson and Kebarle, 1976 | gas phase; switching reaction(K+)H2O; Davidson and Kebarle, 1976, 2; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 21.8 | cal/mol*K | HPMS | Davidson and Kebarle, 1976 | gas phase; switching reaction(K+)H2O; Davidson and Kebarle, 1976, 2; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 12.7 | kcal/mol | HPMS | Davidson and Kebarle, 1976 | gas phase; switching reaction(K+)H2O; Davidson and Kebarle, 1976, 2; M |
By formula: Li+ + CH5N = (Li+ • CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 41.1 | kcal/mol | ICR | Woodin and Beauchamp, 1978 | gas phase; switching reaction(Li+)H2O, Entropy change calculated or estimated; Dzidic and Kebarle, 1970 interpolated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 26. | cal/mol*K | N/A | Woodin and Beauchamp, 1978 | gas phase; switching reaction(Li+)H2O, Entropy change calculated or estimated; Dzidic and Kebarle, 1970 interpolated; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrG° | 33.3 | kcal/mol | ICR | Woodin and Beauchamp, 1978 | gas phase; switching reaction(Li+)H2O, Entropy change calculated or estimated; Dzidic and Kebarle, 1970 interpolated; M |
By formula: Na+ + CH5N = (Na+ • CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 26.3 ± 0.2 | kcal/mol | HPMS | Hoyau, Norrman, et al., 1999 | RCD |
ΔrH° | 32.1 | kcal/mol | HPMS | Guo and Castleman, 1990 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 22600. | cal/mol*K | HPMS | Hoyau, Norrman, et al., 1999 | RCD |
ΔrS° | 30.3 | cal/mol*K | HPMS | Guo and Castleman, 1990 | gas phase; M |
Free energy of reaction
ΔrG° (kcal/mol) | T (K) | Method | Reference | Comment |
---|---|---|---|---|
19.5 | 298. | IMRE | McMahon and Ohanessian, 2000 | Anchor alanine=39.89; RCD |
By formula: Pb+ + CH5N = (Pb+ • CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 35.4 ± 0.3 | kcal/mol | HPMS | Guo and Castleman, 1990 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 30.0 | cal/mol*K | HPMS | Guo and Castleman, 1990 | gas phase; M |
By formula: (Pb+ • CH5N) + CH5N = (Pb+ • 2CH5N)
Quantity | Value | Units | Method | Reference | Comment |
---|---|---|---|---|---|
ΔrH° | 19.1 ± 0.2 | kcal/mol | HPMS | Guo and Castleman, 1990 | gas phase; M |
Quantity | Value | Units | Method | Reference | Comment |
ΔrS° | 19.5 | cal/mol*K | HPMS | Guo and Castleman, 1990 | gas phase; M |
IR Spectrum
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, Mass spectrum (electron ionization), UV/Visible spectrum, 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
Gas Phase Spectrum
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Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.
Additional Data
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Download spectrum in JCAMP-DX format.
Owner | NIST Standard Reference Data Program Collection (C) 2018 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
---|---|
Origin | Sadtler Research Labs Under US-EPA Contract |
State | gas |
Mass spectrum (electron ionization)
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, UV/Visible spectrum, 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
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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 | Japan AIST/NIMC Database- Spectrum MS-NW- 377 |
NIST MS number | 228024 |
UV/Visible spectrum
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, 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: Victor Talrose, Eugeny B. Stern, Antonina A. Goncharova, Natalia A. Messineva, Natalia V. Trusova, Margarita V. Efimkina
Spectrum
Notice: This spectrum may be better viewed with a Javascript and HTML 5 enabled browser.
Additional Data
View image of digitized spectrum (can be printed in landscape orientation).
View spectrum image in SVG format.
Download spectrum in JCAMP-DX format.
Source | Tannenbaum, Coffin, et al., 1953 |
---|---|
Owner | INEP CP RAS, NIST OSRD Collection (C) 2007 copyright by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved. |
Origin | INSTITUTE OF ENERGY PROBLEMS OF CHEMICAL PHYSICS, RAS |
Source reference | RAS UV No. 2772 |
Instrument | n.i.g. |
Sample pressure | 0.01-1.8 mm Hg |
Melting point | -93.4 |
Boiling point | -6.3 |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Aston, Siller, et al., 1937
Aston, J.G.; Siller, C.W.; Messerly, G.H.,
Heat capacities and entropies of organic compounds. III. Methylamine from 11.5°K. to the boiling point. Heat of vaporization and vapor pressure. The entropy from molecular data,
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Lemoult, 1907
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Aston, Siller, et al., 1937, 2
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Heat capacities and entropies of organic compounds. III. Methylamine from 12K to the boiling point. Heat of vaporization and vapor pressure. The entropy from molecular data,
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Roberts, Emeleus, et al., 1939
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Davidson and Kebarle, 1976, 2
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Ionic Solvation by Aprotic Solvents. Gas Phase Solvation of the Alkali Ions by Acetonitrile,
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A Quantitative Basis for a Scale of Na+ Affinities of Organic and Small Biological Molecules in the Gas Phase,
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The Association Reactions of Pb+ Ion with CH3OH and CH3NH2 in the Gas Phase,
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The Thermochemical Properties of Gas - Phase Transition Metal Ion Complexes,
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. [all data]
MacKay, Hemsworth, et al., 1976
MacKay, G.J.; Hemsworth, R.S.; Bohme, D.K.,
Absolute gas-phase acidities of CH3NH2, C2H5NH2, (CH3)2NH, and (CH3)3N,
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Gas-Phase (CH3)3Si+ Affinities of Alkylamines and Proton Affinities of Trimethylsilyl Alkylamines,
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Wojtyniak and Stone, 1986
Wojtyniak, A.C.M.; Stone, A.J.,
A High-Pressure Mass Spectrometric Study of the Bonding of Trimethylsilylium to Oxygen and Aromatic Bases,
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Yamdagni and Kebarle, 1973
Yamdagni, R.; Kebarle, P.,
Gas - Phase Basicites of Amines. Hydrogen Bonding in Proton - Bound Amine Dimers and Proton - Induced Cyclization of alpha, omega - Diamines,
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Meot-Ner, 1984
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Holm, 1983
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Issoire and Long, 1960
Issoire, J.; Long, C.,
Etude de la thermodynamique chimique de la reaction de formation des methylamines,
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Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update,
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Steric inhibition of resonance studied by molecular photoelectron spectroscopy Part 3. Anilines, Phenols and Related Compounds,
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Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, References
- Symbols used in this document:
AE Appearance energy Cp,liquid Constant pressure heat capacity of liquid IE (evaluated) Recommended ionization energy Pc Critical pressure S°liquid Entropy of liquid at standard conditions 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 ΔcH°liquid Enthalpy of combustion of liquid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔfusH Enthalpy of fusion ΔfusS Entropy of fusion ΔrG° Free energy of reaction at standard conditions ΔrH° Enthalpy of reaction at standard conditions ΔrS° Entropy of reaction at standard conditions ΔvapH Enthalpy of vaporization ΔvapH° Enthalpy of vaporization at standard conditions ΔvapS Entropy of vaporization - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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