Difluorochloromethane

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Gas phase thermochemistry data

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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

Quantity Value Units Method Reference Comment
Δfgas-115.10kcal/molReviewChase, 1998Data last reviewed in June, 1970
Δfgas-115.4 ± 0.7kcal/molKinEdwards and Small, 1965Corrected for CODATA value of ΔfH; ALS
Quantity Value Units Method Reference Comment
gas,1 bar67.151cal/mol*KReviewChase, 1998Data last reviewed in June, 1970

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 1200.1200. to 6000.
A 6.05513024.15939
B 36.080310.870842
C -27.75889-0.167207
D 7.9788100.011132
E -0.081033-2.742532
F -118.5520-128.9070
G 64.4286187.17839
H -115.1000-115.1000
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in June, 1970 Data last reviewed in June, 1970

Gas phase ion energetics data

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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:
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

Quantity Value Units Method Reference Comment
IE (evaluated)12.28 ± 0.02eVN/AN/AL

Ionization energy determinations

IE (eV) Method Reference Comment
12.28 ± 0.02PIWang and Leroi, 1983LBLHLM
12.1PENovak, Cvitas, et al., 1981LLK
12.45 ± 0.05PIWatanabe, Nakayama, et al., 1962RDSH
12.56PENovak, Cvitas, et al., 1981Vertical value; LLK
12.6PEDoucet, Sauvageau, et al., 1973Vertical value; LLK

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
CFCl+15.9 ± 0.3?EIHobrock and Kiser, 1964RDSH
CF+17. ± 0.?EIHobrock and Kiser, 1964RDSH
CF2+16.1 ± 0.3?EIHobrock and Kiser, 1964RDSH
CHFCl+15.11 ± 0.15FEIHobrock and Kiser, 1964RDSH
CHF2+12.59 ± 0.15ClEIHobrock and Kiser, 1964RDSH
Cl+20.5 ± 0.3?EIHobrock and Kiser, 1964RDSH

De-protonation reactions

CClF2- + Hydrogen cation = Difluorochloromethane

By formula: CClF2- + H+ = CHClF2

Quantity Value Units Method Reference Comment
Δr>374.71kcal/molAcidPaulino and Squires, 1991gas phase; Probably CF2..Cl-, non-covalent.; B
Δr378.3 ± 7.0kcal/molD-EADispert and Lacmann, 1978gas phase; From CF2Cl2; B
Quantity Value Units Method Reference Comment
Δr>366.96 ± 0.89kcal/molH-TSPaulino and Squires, 1991gas phase; Probably CF2..Cl-, non-covalent.; B
Δr370.5 ± 7.1kcal/molH-TSDispert and Lacmann, 1978gas phase; From CF2Cl2; B

IR Spectrum

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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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IR spectrum
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Additional Data

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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

This IR spectrum is from the NIST/EPA Gas-Phase Infrared Database .


References

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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, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Edwards and Small, 1965
Edwards, J.W.; Small, P.A., Kinetics of the pyrolysis of chlorodifluoromethane, Ind. Eng. Chem. Fundam., 1965, 4, 396-400. [all data]

Wang and Leroi, 1983
Wang, F.C.-Y.; Leroi, G.E., Photoionization and fragmentation of halogenated methanes, Ann. Isr. Phys. Soc., 1983, 6, 210. [all data]

Novak, Cvitas, et al., 1981
Novak, I.; Cvitas, T.; Klasinc, L.; Gusten, H., Photoelectron spectra of some halogenomethanes, J. Chem. Soc. Faraday Trans. 2, 1981, 77, 2049. [all data]

Watanabe, Nakayama, et al., 1962
Watanabe, K.; Nakayama, T.; Mottl, J., Ionization potentials of some molecules, J. Quant. Spectry. Radiative Transfer, 1962, 2, 369. [all data]

Doucet, Sauvageau, et al., 1973
Doucet, J.; Sauvageau, P.; Sandorfy, C., Vacuum ultraviolet and photoelectron spectra of fluoro-chloro derivatives of methane, J. Chem. Phys., 1973, 58, 3708. [all data]

Hobrock and Kiser, 1964
Hobrock, D.L.; Kiser, R.W., Electron impact studies of some trihalomethanes: trichloromethane, dichlorofluoro-methane, chlorodifluoromethane, and trifluoromethane, J. Phys. Chem., 1964, 68, 575. [all data]

Paulino and Squires, 1991
Paulino, J.A.; Squires, R.R., Carbene Anion Complexes - Unusual Structural and Thermochemical Features of alpha-Halocarbanions in the Gas Phase, J. Am. Chem. Soc., 1991, 113, 5, 1845, https://doi.org/10.1021/ja00005a067 . [all data]

Dispert and Lacmann, 1978
Dispert, H.; Lacmann, K., Negative ion formation in collisions between potassium and fluoro- and chloromethanes: Electron affinities and bond dissociation energies, Int. J. Mass Spectrom. Ion Phys., 1978, 28, 49. [all data]


Notes

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