Chloromethane

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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), 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

Quantity Value Units Method Reference Comment
Δfgas-20.00kcal/molReviewChase, 1998Data last reviewed in June, 1972
Δfgas-19.6 ± 0.36kcal/molReviewManion, 2002adopted flame calorimetry data of Fletcher and Pilcher, 1971 with increased uncertainty to reflect other data; DRB
Δfgas-19.59 ± 0.16kcal/molCcbFletcher and Pilcher, 1971, 2ALS
Δfgas-20.53 ± 0.14kcal/molChydLacher, Emery, et al., 1956Reanalyzed by Cox and Pilcher, 1970, Original value = -20.63 ± 0.14 kcal/mol; ALS
Quantity Value Units Method Reference Comment
Δcgas-182.6 ± 0.12kcal/molCcbFletcher and Pilcher, 1971, 2ALS
Quantity Value Units Method Reference Comment
gas,1 bar56.013cal/mol*KReviewChase, 1998Data last reviewed in June, 1972

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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View table.

Temperature (K) 298. to 1200.1200. to 6000.
A 0.84242121.19190
B 32.726512.406392
C -19.63240-0.460979
D 4.8346010.030638
E 0.066451-4.724761
F -21.31930-36.45581
G 48.4797168.45160
H -20.00000-20.00000
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in June, 1972 Data last reviewed in June, 1972

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), 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.
DH - Eugene S. Domalski and Elizabeth D. Hearing

Quantity Value Units Method Reference Comment
Δfliquid-24.47 ± 0.36kcal/molReviewManion, 2002derived from recommended ΔfHgas° and ΔvapH°; DRB
Quantity Value Units Method Reference Comment
liquid33.480cal/mol*KN/AMesserly and Aston, 1940DH

Constant pressure heat capacity of liquid

Cp,liquid (cal/mol*K) Temperature (K) Reference Comment
19.3293.15Awberg and Griffiths, 1940T = 243 to 303 K. Cp reported at 20°C = 1.598 J/g*K and at 30°C = 1.632 J/g*K.; DH
18.07249.67Messerly and Aston, 1940T = 12 to 249.67 K. Value is unsmoothed experimental datum.; DH
19.4298.Shorthose, 1924T = -30 to 40°C.; 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), 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
DRB - Donald R. Burgess, Jr.
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
Tboil247. ± 10.KAVGN/AAverage of 9 values; Individual data points
Quantity Value Units Method Reference Comment
Tfus182.KN/AAwbery, 1941Uncertainty assigned by TRC = 1.5 K; TRC
Tfus175.55KN/ATimmermans, 1921Uncertainty assigned by TRC = 0.4 K; TRC
Tfus176.5KN/ATimmermans, 1911Uncertainty assigned by TRC = 0.5 K; TRC
Quantity Value Units Method Reference Comment
Ttriple175.43KN/AMesserly and Aston, 1940, 2Uncertainty assigned by TRC = 0.07 K; from T vs 1/f in a calorimter, Resistance thermomter and thermocouple gave same temperature, temp. scale in previous publication; TRC
Ttriple175.44KN/AMesserly and Aston, 1940, 2Uncertainty assigned by TRC = 0.05 K; from T vs 1/f in adiabatic calorimeter, temp. meas. with resistance thermometer & two thermocouples, temp scale described in previous publication; TRC
Quantity Value Units Method Reference Comment
Ptriple0.008587atmN/AMesserly and Aston, 1940, 2Uncertainty assigned by TRC = 0.000013 atm; TRC
Quantity Value Units Method Reference Comment
Tc416. ± 1.KAVGN/AAverage of 6 values; Individual data points
Quantity Value Units Method Reference Comment
Pc66.266atmN/AMansoorian, Hall, et al., 1981Uncertainty assigned by TRC = 0.0066 atm; VP measured up to 408 K,; TRC
Pc65.9190atmN/AHsu and McKetta, 1964Uncertainty assigned by TRC = 0.0400 atm; TRC
Pc65.93atmN/ALeduc, 1909Uncertainty assigned by TRC = 2.0000 atm; TRC
Pc73.03atmN/AVincent and Chappuis, 1886Uncertainty assigned by TRC = 3.0000 atm; TRC
Quantity Value Units Method Reference Comment
ρc7.1895mol/lN/AHsu and McKetta, 1964Uncertainty assigned by TRC = 0.006 mol/l; TRC
ρc7.33mol/lN/ACentnerszwer, 1904Uncertainty assigned by TRC = 0.1 mol/l; extrapolation of rectilnear diam. to Tc; TRC
Quantity Value Units Method Reference Comment
Δvap4.90 ± 0.07kcal/molReviewManion, 2002weighted average of several measurements plus a correction for non-ideality; DRB

Enthalpy of vaporization

ΔvapH (kcal/mol) Temperature (K) Method Reference Comment
5.1470248.94N/AMesserly and Aston, 1940P = 101.325 kPA; DH
5.43235.N/ABeersmans and Jungers, 2010Based on data from 183. to 250. K.; AC
5.26263.N/AGaneff and Jungers, 2010Based on data from 198. to 278. K.; AC
5.26262.AStephenson and Malanowski, 1987Based on data from 247. to 310. K.; AC
5.21383.AStephenson and Malanowski, 1987Based on data from 368. to 416. K.; AC
5.02323.AStephenson and Malanowski, 1987Based on data from 308. to 373. K.; AC
5.62206.N/AThomson, 1946Based on data from 191. to 249. K.; AC
5.40234.N/AMesserly and Aston, 1940Based on data from 192. to 249. K.; AC
4.801293.CYates, 1926ALS
4.80293.CYates, 1926AC

Entropy of vaporization

ΔvapS (cal/mol*K) Temperature (K) Reference Comment
20.68248.94Messerly and Aston, 1940P; 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
303. to 416.34.912871427.52945.137Hsu and McKetta, 1964Coefficents calculated by NIST from author's data.
198. to 278.4.21936951.561-23.468Ganeff and Jungers, 1948Coefficents calculated by NIST from author's data.
183. to 249.44.14883916.223-28.466Beersmans and Jungers, 1947Coefficents calculated by NIST from author's data.

Enthalpy of sublimation

ΔsubH (kcal/mol) Temperature (K) Reference Comment
7.55 ± 0.02151.Bah and Dupont-Pavlovsky, 1995Based on data from 130. to 172. K.; AC

Enthalpy of fusion

ΔfusH (kcal/mol) Temperature (K) Reference Comment
1.537175.44Messerly and Aston, 1940DH
1.53174.5Domalski and Hearing, 1996AC

Entropy of fusion

ΔfusS (cal/mol*K) Temperature (K) Reference Comment
8.762175.44Messerly and Aston, 1940DH

In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products:


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), 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
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

Chlorine anion + Chloromethane = (Chlorine anion • Chloromethane)

By formula: Cl- + CH3Cl = (Cl- • CH3Cl)

Quantity Value Units Method Reference Comment
Δr10.4 ± 1.0kcal/molTDAsLi, Ross, et al., 1996gas phase; B
Δr11.7 ± 2.0kcal/molTDAsHiraoka, Mizuno, et al., 2001gas phase; B
Δr12.2 ± 2.0kcal/molIMRELarson and McMahon, 1984gas phase; B,M
Δr8.60 ± 0.20kcal/molTDAsDougherty, Dalton, et al., 1974gas phase; B,M
Δr15.2 ± 2.0kcal/molTDAsYamdagni and Kebarle, 1971gas phase; B
Quantity Value Units Method Reference Comment
Δr20.5cal/mol*KN/ALarson and McMahon, 1984, 2gas phase; switching reaction(Cl-)t-C4H9OH, Entropy change calculated or estimated; French, Ikuta, et al., 1982; M
Δr15.3cal/mol*KHPMSDougherty, Dalton, et al., 1974gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Δr5.80 ± 0.20kcal/molTDAsLi, Ross, et al., 1996gas phase; B
Δr4.84kcal/molTDAsHiraoka, Mizuno, et al., 2001gas phase; B
Δr6.1 ± 2.0kcal/molIMRELarson and McMahon, 1984gas phase; B,M
Δr4.10 ± 0.50kcal/molTDAsDougherty, Dalton, et al., 1974gas phase; B
Δr10.8 ± 2.0kcal/molTDAsYamdagni and Kebarle, 1971gas phase; B

CH2Cl- + Hydrogen cation = Chloromethane

By formula: CH2Cl- + H+ = CH3Cl

Quantity Value Units Method Reference Comment
Δr399.6 ± 2.5kcal/molEndoHierl, Henchman, et al., 1992gas phase; HO- + ClCH3: 8.8±2.3 kcal/mol endo; B
Δr396.0 ± 3.1kcal/molG+TSIngemann and Nibbering, 1985gas phase; B
Δr396.6 ± 4.6kcal/molEIAERogers, Simpson, et al., 2010gas phase; B
Δr400.0 ± 2.0kcal/molIMRBPoutsma, Nash, et al., 1997gas phase; B
Δr399.1 ± 4.1kcal/molG+TSHenchman, Hierl, et al., 1985gas phase; HO- + MeCl: 0.38±0.1 eV endo; B
Quantity Value Units Method Reference Comment
Δr389.1 ± 3.0kcal/molIMREIngemann and Nibbering, 1985gas phase; B
Δr392.2 ± 4.0kcal/molIMRBHenchman, Hierl, et al., 1985gas phase; HO- + MeCl: 0.38±0.1 eV endo; B

(CH2Cl+ • Chloromethane) + Chloromethane = (CH2Cl+ • 2Chloromethane)

By formula: (CH2Cl+ • CH3Cl) + CH3Cl = (CH2Cl+ • 2CH3Cl)

Quantity Value Units Method Reference Comment
Δr5.7kcal/molHPMSLuczynski, Malicki, et al., 1974gas phase; DG from graph, Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Δr6.9cal/mol*KHPMSLuczynski, Malicki, et al., 1974gas phase; DG from graph, Entropy change is questionable; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
4.4182.HPMSLuczynski, Malicki, et al., 1974gas phase; DG from graph, Entropy change is questionable; M

(CH4Cl+ • Chloromethane) + Chloromethane = (CH4Cl+ • 2Chloromethane)

By formula: (CH4Cl+ • CH3Cl) + CH3Cl = (CH4Cl+ • 2CH3Cl)

Quantity Value Units Method Reference Comment
Δr4.2kcal/molHPMSLuczynski, Malicki, et al., 1974gas phase; DG from graph, Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Δr1.1cal/mol*KHPMSLuczynski, Malicki, et al., 1974gas phase; DG from graph, Entropy change is questionable; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
4.0182.HPMSLuczynski, Malicki, et al., 1974gas phase; DG from graph, Entropy change is questionable; M

CH2Cl+ + Chloromethane = (CH2Cl+ • Chloromethane)

By formula: CH2Cl+ + CH3Cl = (CH2Cl+ • CH3Cl)

Quantity Value Units Method Reference Comment
Δr6.9kcal/molHPMSLuczynski, Malicki, et al., 1974gas phase; DG from graph, Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Δr-3.7cal/mol*KHPMSLuczynski, Malicki, et al., 1974gas phase; DG from graph, Entropy change is questionable; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
8.1312.HPMSLuczynski, Malicki, et al., 1974gas phase; DG from graph, Entropy change is questionable; M

C3H7+ + Chloromethane = (C3H7+ • Chloromethane)

By formula: C3H7+ + CH3Cl = (C3H7+ • CH3Cl)

Quantity Value Units Method Reference Comment
Δr22.9kcal/molPHPMSSen Sharma and Kebarle, 1978gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Δr44.5cal/mol*KPHPMSSen Sharma and Kebarle, 1978gas phase; Entropy change is questionable; M

Methyl cation + Chloromethane = (Methyl cation • Chloromethane)

By formula: CH3+ + CH3Cl = (CH3+ • CH3Cl)

Quantity Value Units Method Reference Comment
Δr62.0kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

Bromine anion + Chloromethane = (Bromine anion • Chloromethane)

By formula: Br- + CH3Cl = (Br- • CH3Cl)

Quantity Value Units Method Reference Comment
Δr10.9 ± 1.0kcal/molTDAsLi, Ross, et al., 1996gas phase; B
Quantity Value Units Method Reference Comment
Δr4.85 ± 0.20kcal/molTDAsLi, Ross, et al., 1996gas phase; B

CN- + Chloromethane = (CN- • Chloromethane)

By formula: CN- + CH3Cl = (CN- • CH3Cl)

Quantity Value Units Method Reference Comment
Δr10.2 ± 1.0kcal/molTDAsLi, Ross, et al., 1996gas phase; B
Quantity Value Units Method Reference Comment
Δr4.90 ± 0.20kcal/molTDAsLi, Ross, et al., 1996gas phase; B

CH3Cl2- + 2Chloromethane = C2H6Cl3-

By formula: CH3Cl2- + 2CH3Cl = C2H6Cl3-

Quantity Value Units Method Reference Comment
Δr11.10kcal/molN/AHiraoka, Mizuno, et al., 2001gas phase; B
Quantity Value Units Method Reference Comment
Δr3.94kcal/molTDAsHiraoka, Mizuno, et al., 2001gas phase; B

C2H6Cl3- + 3Chloromethane = C3H9Cl4-

By formula: C2H6Cl3- + 3CH3Cl = C3H9Cl4-

Quantity Value Units Method Reference Comment
Δr8.40kcal/molN/AHiraoka, Mizuno, et al., 2001gas phase; B
Quantity Value Units Method Reference Comment
Δr2.14kcal/molTDAsHiraoka, Mizuno, et al., 2001gas phase; B

C3H9Cl4- + 4Chloromethane = C4H12Cl5-

By formula: C3H9Cl4- + 4CH3Cl = C4H12Cl5-

Quantity Value Units Method Reference Comment
Δr7.60kcal/molN/AHiraoka, Mizuno, et al., 2001gas phase; B
Quantity Value Units Method Reference Comment
Δr1.34kcal/molTDAsHiraoka, Mizuno, et al., 2001gas phase; B

C4H12Cl5- + 5Chloromethane = C5H15Cl6-

By formula: C4H12Cl5- + 5CH3Cl = C5H15Cl6-

Quantity Value Units Method Reference Comment
Δr6.20kcal/molN/AHiraoka, Mizuno, et al., 2001gas phase; B
Quantity Value Units Method Reference Comment
Δr0.83kcal/molTDAsHiraoka, Mizuno, et al., 2001gas phase; B

C5H15Cl6- + 6Chloromethane = C6H18Cl7-

By formula: C5H15Cl6- + 6CH3Cl = C6H18Cl7-

Quantity Value Units Method Reference Comment
Δr5.80kcal/molN/AHiraoka, Mizuno, et al., 2001gas phase; B
Quantity Value Units Method Reference Comment
Δr0.43kcal/molTDAsHiraoka, Mizuno, et al., 2001gas phase; B

C6H18Cl7- + 7Chloromethane = C7H21Cl8-

By formula: C6H18Cl7- + 7CH3Cl = C7H21Cl8-

Quantity Value Units Method Reference Comment
Δr4.80kcal/molN/AHiraoka, Mizuno, et al., 2001gas phase; B
Quantity Value Units Method Reference Comment
Δr0.63kcal/molTDAsHiraoka, Mizuno, et al., 2001gas phase; B

C7H21Cl8- + 8Chloromethane = C8H24Cl9-

By formula: C7H21Cl8- + 8CH3Cl = C8H24Cl9-

Quantity Value Units Method Reference Comment
Δr4.70kcal/molN/AHiraoka, Mizuno, et al., 2001gas phase; B
Quantity Value Units Method Reference Comment
Δr0.53kcal/molTDAsHiraoka, Mizuno, et al., 2001gas phase; B

C2H5+ + Chloromethane = (C2H5+ • Chloromethane)

By formula: C2H5+ + CH3Cl = (C2H5+ • CH3Cl)

Quantity Value Units Method Reference Comment
Δr30.7kcal/molPHPMSSen Sharma and Kebarle, 1978gas phase; M
Quantity Value Units Method Reference Comment
Δr30.7cal/mol*KPHPMSSen Sharma and Kebarle, 1978gas phase; M

Lithium ion (1+) + Chloromethane = (Lithium ion (1+) • Chloromethane)

By formula: Li+ + CH3Cl = (Li+ • CH3Cl)

Quantity Value Units Method Reference Comment
Δr25.kcal/molICRStaley and Beauchamp, 1975gas phase; switching reaction(Li+)H2O, from graph; Dzidic and Kebarle, 1970 interpolated; M

C4H9+ + Chloromethane = (C4H9+ • Chloromethane)

By formula: C4H9+ + CH3Cl = (C4H9+ • CH3Cl)

Quantity Value Units Method Reference Comment
Δr8.4kcal/molPHPMSSharma, Meza de Hojer, et al., 1985gas phase; M
Quantity Value Units Method Reference Comment
Δr19.3cal/mol*KPHPMSSharma, Meza de Hojer, et al., 1985gas phase; M

CH6N+ + Chloromethane = (CH6N+ • Chloromethane)

By formula: CH6N+ + CH3Cl = (CH6N+ • CH3Cl)

Quantity Value Units Method Reference Comment
Δr10.7kcal/molPHPMSMeot-Ner, 1984gas phase; M
Quantity Value Units Method Reference Comment
Δr20.6cal/mol*KPHPMSMeot-Ner, 1984gas phase; M

Hydrogen + Chloromethane = Methane + Hydrogen chloride

By formula: H2 + CH3Cl = CH4 + HCl

Quantity Value Units Method Reference Comment
Δr-19.3 ± 0.1kcal/molChydLacher, Emery, et al., 1956gas 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), 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) = H exp(d(ln(kH))/d(1/T) ((1/T) - 1/(298.15 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)

H (mol/(kg*bar)) d(ln(kH))/d(1/T) (K) Method Reference Comment
0.0943000.MN/A 
0.12 QN/A missing citation give several references for the Henry's law constants but don't assign them to specific species.
0.124200.MGossett, 1987 
0.029-630.XN/A 
0.11 LN/A 
0.0992900.XN/A 
0.11 VN/A 
0.12 VN/AValue at T = 293. K.
0.102800.LN/A 
0.10 VN/A 
0.13 MPearson and McConnell, 1975The same data was also published in missing citation. Value at T = 293. K.

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), 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
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 CH3Cl+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
IE (evaluated)11.26 ± 0.03eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)154.7kcal/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity148.4kcal/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
11.221SHochmann, Templet, et al., 1975LLK
11.28 ± 0.01PIWerner, Tsai, et al., 1974LLK
11.27EILossing, 1972LLK
11.29PERagle, Stenhouse, et al., 1970RDSH
11.26PEDewar and Worley, 1969RDSH
11.265 ± 0.003PINicholson, 1965RDSH
11.28PIDibeler and Walker, 1965RDSH
11.28 ± 0.01PIWatanabe, 1957RDSH
11.22 ± 0.01SPrice, 1936RDSH
11.29PEKimura, Katsumata, et al., 1981Vertical value; LLK
11.29PEUtsunomiya, Kobayashi, et al., 1980Vertical value; LLK
11.33PEUehara, Saito, et al., 1973Vertical value; LLK
11.30PEDixon, Murrell, et al., 1971Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C+26.3 ± 0.1?EIReed and Snedden, 1956RDSH
CH+22.5 ± 0.06?EIReed and Snedden, 1956RDSH
CH2+14.6 ± 0.2HClEITsuda and Hamill, 1964RDSH
CH2Cl+12.96HEILossing, 1972LLK
CH2Cl+12.98 ± 0.07HEIMartin, Lampe, et al., 1966RDSH
CH3+13.87ClPIKrauss, Walker, et al., 1968RDSH
CH3+10.07Cl-PIDibeler and Walker, 1965RDSH
Cl+16.6 ± 0.05CH3EITsuda, Melton, et al., 1964RDSH

De-protonation reactions

CH2Cl- + Hydrogen cation = Chloromethane

By formula: CH2Cl- + H+ = CH3Cl

Quantity Value Units Method Reference Comment
Δr399.6 ± 2.5kcal/molEndoHierl, Henchman, et al., 1992gas phase; HO- + ClCH3: 8.8±2.3 kcal/mol endo; B
Δr396.0 ± 3.1kcal/molG+TSIngemann and Nibbering, 1985gas phase; B
Δr396.6 ± 4.6kcal/molEIAERogers, Simpson, et al., 2010gas phase; B
Δr400.0 ± 2.0kcal/molIMRBPoutsma, Nash, et al., 1997gas phase; B
Δr399.1 ± 4.1kcal/molG+TSHenchman, Hierl, et al., 1985gas phase; HO- + MeCl: 0.38±0.1 eV endo; B
Quantity Value Units Method Reference Comment
Δr389.1 ± 3.0kcal/molIMREIngemann and Nibbering, 1985gas phase; B
Δr392.2 ± 4.0kcal/molIMRBHenchman, Hierl, et al., 1985gas phase; HO- + MeCl: 0.38±0.1 eV endo; 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), 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

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

Bromine anion + Chloromethane = (Bromine anion • Chloromethane)

By formula: Br- + CH3Cl = (Br- • CH3Cl)

Quantity Value Units Method Reference Comment
Δr10.9 ± 1.0kcal/molTDAsLi, Ross, et al., 1996gas phase; B
Quantity Value Units Method Reference Comment
Δr4.85 ± 0.20kcal/molTDAsLi, Ross, et al., 1996gas phase; B

CH2Cl+ + Chloromethane = (CH2Cl+ • Chloromethane)

By formula: CH2Cl+ + CH3Cl = (CH2Cl+ • CH3Cl)

Quantity Value Units Method Reference Comment
Δr6.9kcal/molHPMSLuczynski, Malicki, et al., 1974gas phase; DG from graph, Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Δr-3.7cal/mol*KHPMSLuczynski, Malicki, et al., 1974gas phase; DG from graph, Entropy change is questionable; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
8.1312.HPMSLuczynski, Malicki, et al., 1974gas phase; DG from graph, Entropy change is questionable; M

(CH2Cl+ • Chloromethane) + Chloromethane = (CH2Cl+ • 2Chloromethane)

By formula: (CH2Cl+ • CH3Cl) + CH3Cl = (CH2Cl+ • 2CH3Cl)

Quantity Value Units Method Reference Comment
Δr5.7kcal/molHPMSLuczynski, Malicki, et al., 1974gas phase; DG from graph, Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Δr6.9cal/mol*KHPMSLuczynski, Malicki, et al., 1974gas phase; DG from graph, Entropy change is questionable; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
4.4182.HPMSLuczynski, Malicki, et al., 1974gas phase; DG from graph, Entropy change is questionable; M

Methyl cation + Chloromethane = (Methyl cation • Chloromethane)

By formula: CH3+ + CH3Cl = (CH3+ • CH3Cl)

Quantity Value Units Method Reference Comment
Δr62.0kcal/molPHPMSMcMahon, Heinis, et al., 1988gas phase; switching reaction(CH3+)N2, Entropy change calculated or estimated, uses MCA(N2) = 48.3 kcal/mol; Foster, Williamson, et al., 1974; M

CH3Cl2- + 2Chloromethane = C2H6Cl3-

By formula: CH3Cl2- + 2CH3Cl = C2H6Cl3-

Quantity Value Units Method Reference Comment
Δr11.10kcal/molN/AHiraoka, Mizuno, et al., 2001gas phase; B
Quantity Value Units Method Reference Comment
Δr3.94kcal/molTDAsHiraoka, Mizuno, et al., 2001gas phase; B

(CH4Cl+ • Chloromethane) + Chloromethane = (CH4Cl+ • 2Chloromethane)

By formula: (CH4Cl+ • CH3Cl) + CH3Cl = (CH4Cl+ • 2CH3Cl)

Quantity Value Units Method Reference Comment
Δr4.2kcal/molHPMSLuczynski, Malicki, et al., 1974gas phase; DG from graph, Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Δr1.1cal/mol*KHPMSLuczynski, Malicki, et al., 1974gas phase; DG from graph, Entropy change is questionable; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
4.0182.HPMSLuczynski, Malicki, et al., 1974gas phase; DG from graph, Entropy change is questionable; M

CH6N+ + Chloromethane = (CH6N+ • Chloromethane)

By formula: CH6N+ + CH3Cl = (CH6N+ • CH3Cl)

Quantity Value Units Method Reference Comment
Δr10.7kcal/molPHPMSMeot-Ner, 1984gas phase; M
Quantity Value Units Method Reference Comment
Δr20.6cal/mol*KPHPMSMeot-Ner, 1984gas phase; M

CN- + Chloromethane = (CN- • Chloromethane)

By formula: CN- + CH3Cl = (CN- • CH3Cl)

Quantity Value Units Method Reference Comment
Δr10.2 ± 1.0kcal/molTDAsLi, Ross, et al., 1996gas phase; B
Quantity Value Units Method Reference Comment
Δr4.90 ± 0.20kcal/molTDAsLi, Ross, et al., 1996gas phase; B

C2H5+ + Chloromethane = (C2H5+ • Chloromethane)

By formula: C2H5+ + CH3Cl = (C2H5+ • CH3Cl)

Quantity Value Units Method Reference Comment
Δr30.7kcal/molPHPMSSen Sharma and Kebarle, 1978gas phase; M
Quantity Value Units Method Reference Comment
Δr30.7cal/mol*KPHPMSSen Sharma and Kebarle, 1978gas phase; M

C2H6Cl3- + 3Chloromethane = C3H9Cl4-

By formula: C2H6Cl3- + 3CH3Cl = C3H9Cl4-

Quantity Value Units Method Reference Comment
Δr8.40kcal/molN/AHiraoka, Mizuno, et al., 2001gas phase; B
Quantity Value Units Method Reference Comment
Δr2.14kcal/molTDAsHiraoka, Mizuno, et al., 2001gas phase; B

C3H7+ + Chloromethane = (C3H7+ • Chloromethane)

By formula: C3H7+ + CH3Cl = (C3H7+ • CH3Cl)

Quantity Value Units Method Reference Comment
Δr22.9kcal/molPHPMSSen Sharma and Kebarle, 1978gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Δr44.5cal/mol*KPHPMSSen Sharma and Kebarle, 1978gas phase; Entropy change is questionable; M

C3H9Cl4- + 4Chloromethane = C4H12Cl5-

By formula: C3H9Cl4- + 4CH3Cl = C4H12Cl5-

Quantity Value Units Method Reference Comment
Δr7.60kcal/molN/AHiraoka, Mizuno, et al., 2001gas phase; B
Quantity Value Units Method Reference Comment
Δr1.34kcal/molTDAsHiraoka, Mizuno, et al., 2001gas phase; B

C4H9+ + Chloromethane = (C4H9+ • Chloromethane)

By formula: C4H9+ + CH3Cl = (C4H9+ • CH3Cl)

Quantity Value Units Method Reference Comment
Δr8.4kcal/molPHPMSSharma, Meza de Hojer, et al., 1985gas phase; M
Quantity Value Units Method Reference Comment
Δr19.3cal/mol*KPHPMSSharma, Meza de Hojer, et al., 1985gas phase; M

C4H12Cl5- + 5Chloromethane = C5H15Cl6-

By formula: C4H12Cl5- + 5CH3Cl = C5H15Cl6-

Quantity Value Units Method Reference Comment
Δr6.20kcal/molN/AHiraoka, Mizuno, et al., 2001gas phase; B
Quantity Value Units Method Reference Comment
Δr0.83kcal/molTDAsHiraoka, Mizuno, et al., 2001gas phase; B

C5H15Cl6- + 6Chloromethane = C6H18Cl7-

By formula: C5H15Cl6- + 6CH3Cl = C6H18Cl7-

Quantity Value Units Method Reference Comment
Δr5.80kcal/molN/AHiraoka, Mizuno, et al., 2001gas phase; B
Quantity Value Units Method Reference Comment
Δr0.43kcal/molTDAsHiraoka, Mizuno, et al., 2001gas phase; B

C6H18Cl7- + 7Chloromethane = C7H21Cl8-

By formula: C6H18Cl7- + 7CH3Cl = C7H21Cl8-

Quantity Value Units Method Reference Comment
Δr4.80kcal/molN/AHiraoka, Mizuno, et al., 2001gas phase; B
Quantity Value Units Method Reference Comment
Δr0.63kcal/molTDAsHiraoka, Mizuno, et al., 2001gas phase; B

C7H21Cl8- + 8Chloromethane = C8H24Cl9-

By formula: C7H21Cl8- + 8CH3Cl = C8H24Cl9-

Quantity Value Units Method Reference Comment
Δr4.70kcal/molN/AHiraoka, Mizuno, et al., 2001gas phase; B
Quantity Value Units Method Reference Comment
Δr0.53kcal/molTDAsHiraoka, Mizuno, et al., 2001gas phase; B

Chlorine anion + Chloromethane = (Chlorine anion • Chloromethane)

By formula: Cl- + CH3Cl = (Cl- • CH3Cl)

Quantity Value Units Method Reference Comment
Δr10.4 ± 1.0kcal/molTDAsLi, Ross, et al., 1996gas phase; B
Δr11.7 ± 2.0kcal/molTDAsHiraoka, Mizuno, et al., 2001gas phase; B
Δr12.2 ± 2.0kcal/molIMRELarson and McMahon, 1984gas phase; B,M
Δr8.60 ± 0.20kcal/molTDAsDougherty, Dalton, et al., 1974gas phase; B,M
Δr15.2 ± 2.0kcal/molTDAsYamdagni and Kebarle, 1971gas phase; B
Quantity Value Units Method Reference Comment
Δr20.5cal/mol*KN/ALarson and McMahon, 1984, 2gas phase; switching reaction(Cl-)t-C4H9OH, Entropy change calculated or estimated; French, Ikuta, et al., 1982; M
Δr15.3cal/mol*KHPMSDougherty, Dalton, et al., 1974gas phase; Entropy change is questionable; M
Quantity Value Units Method Reference Comment
Δr5.80 ± 0.20kcal/molTDAsLi, Ross, et al., 1996gas phase; B
Δr4.84kcal/molTDAsHiraoka, Mizuno, et al., 2001gas phase; B
Δr6.1 ± 2.0kcal/molIMRELarson and McMahon, 1984gas phase; B,M
Δr4.10 ± 0.50kcal/molTDAsDougherty, Dalton, et al., 1974gas phase; B
Δr10.8 ± 2.0kcal/molTDAsYamdagni and Kebarle, 1971gas phase; B

Lithium ion (1+) + Chloromethane = (Lithium ion (1+) • Chloromethane)

By formula: Li+ + CH3Cl = (Li+ • CH3Cl)

Quantity Value Units Method Reference Comment
Δr25.kcal/molICRStaley and Beauchamp, 1975gas phase; switching reaction(Li+)H2O, from graph; Dzidic and Kebarle, 1970 interpolated; 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), 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: Coblentz Society, Inc.

Gas Phase Spectrum

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IR spectrum
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Notice: Except where noted, spectra from this collection were measured on dispersive instruments, often in carefully selected solvents, and hence may differ in detail from measurements on FTIR instruments or in other chemical environments. More information on the manner in which spectra in this collection were collected can be found here.

Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.

Additional Data

View scan of original (hardcopy) spectrum.

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Download spectrum in JCAMP-DX format.

Owner COBLENTZ SOCIETY
Collection (C) 2018 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin DOW CHEMICAL COMPANY
Source reference COBLENTZ NO. 8844
Date 1964
Name(s) chloromethane
State GAS (200 mmHg DILUTED TO A TOTAL PRESSURE OF 600 mmHg WITH NITROGEN)
Instrument DOW KBr FOREPRISM
Instrument parameters GRATING CHANGED AT 5.0, 7.5, 15.0 MICRON
Path length 5 CM
SPECTRAL CONTAMINATION DUE TO METHANE AROUND 1310 CM-1
Resolution 4
Sampling procedure TRANSMISSION
Data processing DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS)

This IR spectrum is from the Coblentz Society's evaluated infrared reference spectra collection.


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, 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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Mass 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.
NIST MS number 18894

All mass spectra in this site (plus many more) are available from the NIST/EPA/NIH Mass Spectral Library. Please see the following for information about the library and its accompanying search program.


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), Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Chase, 1998
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Fletcher and Pilcher, 1971, 2
Fletcher, R.A.; Pilcher, G., Measurements of heats of combustion by flame calorimetry. Part 7.-Chloromethane, chloroethane, 1-chloropropane, 2-chloropropane, Trans. Faraday Soc., 1971, 67, 3191-3201. [all data]

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Messerly, G.H.; Aston, J.G., The heat capacity and entropy, heats of fusion and vaporization and the vapor pressure of methyl chloride, J. Am. Chem. Soc., 1940, 62, 886-890. [all data]

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Messerly, G.H.; Aston, J.G., The Heat Capacity and Entropy, Heats of Fusion and Vaporization and the Vapor Pressure of Methyl Chloride, J. Am. Chem. Soc., 1940, 62, 886-90. [all data]

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Beersmans, J.; Jungers, J.C., Synthèse et Étude des Chlorure, Bromure et Iodure de Deutérométhyle, Bull. Soc. Chim. Belges, 2010, 56, 5-8, 238-250, https://doi.org/10.1002/bscb.19470560506 . [all data]

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Ganeff, Jean M.; Jungers, Joseph C., Tensions de vapeur du système CH3Cl «63743» CH2Cl2, Bull. Soc. Chim. Belges, 2010, 57, 1-3, 82-87, https://doi.org/10.1002/bscb.19480570109 . [all data]

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Beersmans and Jungers, 1947
Beersmans, J.; Jungers, J.C., Synthese et Etude des Chlorure, Bromure et Iodure de Deuteromethyle, Bull. Soc. Chim. Belg., 1947, 56, 5-8, 238-250, https://doi.org/10.1002/bscb.19470560506 . [all data]

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Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III, J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985 . [all data]

Li, Ross, et al., 1996
Li, C.; Ross, P.; Szulejko, J.; McMahon, T.B., High-Pressure Mass Spectrometric Investigations of the Potential Energy Surfaces of Gas-Phase Sn2 Reactions., J. Am. Chem. Soc., 1996, 118, 39, 9360, https://doi.org/10.1021/ja960565o . [all data]

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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 . [all data]

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Larson, J.W.; McMahon, T.B., Hydrogen bonding in gas phase anions. An experimental investigation of the interaction between chloride ion and bronsted acids from ICR chloride exchange equilibria, J. Am. Chem. Soc., 1984, 106, 517. [all data]

Dougherty, Dalton, et al., 1974
Dougherty, R.C.; Dalton, J.; Roberts, J.D., SN2 reactions in the gas phase: Structure of the transition state, Org. Mass Spectrom., 1974, 8, 77. [all data]

Yamdagni and Kebarle, 1971
Yamdagni, R.; Kebarle, P., Hydrogen bonding energies to negative ions from gas phase measurements of ionic equilibria, J. Am. Chem. Soc., 1971, 93, 7139. [all data]

Larson and McMahon, 1984, 2
Larson, J.W.; McMahon, T.B., Gas phase negative ion chemistry of alkylchloroformates, Can. J. Chem., 1984, 62, 675. [all data]

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French, M.A.; Ikuta, S.; Kebarle, P., Hydrogen bonding of O-H and C-H hydrogen donors to Cl-. Results from mass spectrometric measurement of the ion-molecule equilibria RH + Cl- = RHCl-, Can. J. Chem., 1982, 60, 1907. [all data]

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Hierl, P.M.; Henchman, M.J.; Paulson, J.F., Threshold Energies for the Reactions HO- + MeX - MeOH + X- measured by Tandem Mass Spectrometry: Acidities of MeCl and MeBr, Int. J. Mass Spectrom. Ion Proc., 1992, 117, 475, https://doi.org/10.1016/0168-1176(92)80109-E . [all data]

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Ingemann, S.; Nibbering, N.M.M., Gas-phase acidity of CH3X [X = P(CH3)2, SCH3, F, Cl, Br, I] compounds, J. Chem. Soc. Perkin Trans. 2, 1985, 837. [all data]

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Poutsma, J.C.; Nash, J.J.; Paulino, J.A.; Squires, R.R., Absolute Heats of Formation of Phenylcarbene and Vinylcarbene, J. Am. Chem. Soc., 1997, 119, 20, 4686, https://doi.org/10.1021/ja963918s . [all data]

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Henchman, M.; Hierl, P.M.; Paulson, J.F., Nucleophilic displacement vs. proton tranfer: The system OH-.(H2O)0,1,2 + CH3Cl in the relative energy range 0.03-5 eV, J. Am. Chem. Soc., 1985, 107, 2812. [all data]

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Luczynski, Z.; Malicki, W.; Wincel, H., Positive Ion Reactions of Methyl Cloride in the Gas Phase, Int. J. Mass Spectrom. Ion Phys., 1974, 15, 3, 321, https://doi.org/10.1016/0020-7381(74)85009-6 . [all data]

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Sen Sharma, D.K.; Kebarle, P., Binding Energies and Stabilities of Chloronium Ions from Study of the Gas - Phase Equilibria: R1+ + ClR2 = R1ClR2+, J. Am. Chem. Soc., 1978, 100, 18, 5826, https://doi.org/10.1021/ja00486a039 . [all data]

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McMahon, T.; Heinis, T.; Nicol, G.; Hovey, J.K.; Kebarle, P., Methyl Cation Affinities, J. Am. Chem. Soc., 1988, 110, 23, 7591, https://doi.org/10.1021/ja00231a002 . [all data]

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Notes

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