CH

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Species data

Common Formula	CH
Stoichiometric Formula	CH
Name	Methylidyne
Mass	13.00783 a.m.u
Charge	0
CAS	3315-37-5
Inchi	InChI=1S/CH/h1H
InchiKey	VRLIPUYDFBXWCH-UHFFFAOYSA-N
State	Ground State

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KIDA CH

ISM Abundance

log₁₀ Abundance	Reference	Source Name	Source Type	Link

Polarizability

Evaluation	Definition	Value (Å³)	Method	Origin	Reference
	total	2.12	Calculations	Bibliography	Woon, D. E. et al. ;2009;Astrophysical Journal Supplement Series ;185,273-288

Definition: total Value (Å³): 2.12 Method: Calculations Origin: Bibliography Reference: Woon, D. E. et al. ;2009;Astrophysical Journal Supplement Series ;185,273-288

Dipole moment

Evaluation	Value (D)	Method	Origin	Reference
	1.394	Calculations	Bibliography	Woon, D. E. et al. ;2009;Astrophysical Journal Supplement Series ;185,273-288

Value (D): 1.394 Method: Calculations Origin: Bibliography Reference: Woon, D. E. et al. ;2009;Astrophysical Journal Supplement Series ;185,273-288

Enthalpy of formation

Evaluation	T (K)	Value (kJ.mol^-1)	Method	Origin	Reference
	0	592.5 ±0.6	Reviews and Evaluations	Database : Burcat
	298	595.8 ±0.6	Reviews and Evaluations	Database : Burcat
	298	595.8 ±0.6	Measurements	Database : CCCBDB (http://cccbdb.nist.gov/)
	0	592.5 ±0.6	Measurements	Database : CCCBDB (http://cccbdb.nist.gov/)

T (K): 0 Value (kJ.mol^-1) : 592.5 ±0.6 Method: Reviews and Evaluations Origin: Other database Reference:
T (K): 298 Value (kJ.mol^-1) : 595.8 ±0.6 Method: Reviews and Evaluations Origin: Other database Reference:
T (K): 298 Value (kJ.mol^-1) : 595.8 ±0.6 Method: Measurements Origin: Other database Reference:
T (K): 0 Value (kJ.mol^-1) : 592.5 ±0.6 Method: Measurements Origin: Other database Reference:

Desorption energy

Evaluation	E_mean (K)	E_min (K)	E_max (K)	Pre-exponential factor (s^-1)	Order factor	Method	Origin	Reference	Type of surface	Description
	2044 ±94			0.00E+0	1	Calculations	Bibliography	Sil, Milan et al. ;2024;A\&A;690, A252	ASW	The preexponential factor is to be computed using the Hasegawa et al. (1992) approximation.
	925	0	0	0.00E+0	1	Estimation	Database : OSU		H2O	This binding energy was listed in the original OSU gas-grain code from Eric Herbst group in 2006. The pre-exponential factor is not given. It can be computed using the formula given in Hasegawa et al. (1992).

E_mean (K): 2044 ±94 E _min (K): E _max (K): Pre-exponential factor (s^-1): 0.00E+0 Method: Calculations Origin: Bibliography Reference: Sil, Milan et al. ;2024;A\&A;690, A252 Type of surface: ASW Description: The preexponential factor is to be computed using the Hasegawa et al. (1992) approximation. Evaluation:
E_mean (K): 925 E _min (K): 0 E _max (K): 0 Pre-exponential factor (s^-1): 0.00E+0 Method: Estimation Origin: Other database Reference: Type of surface: H2O Description: This binding energy was listed in the original OSU gas-grain code from Eric Herbst group in 2006. The pre-exponential factor is not given. It can be computed using the formula given in Hasegawa et al. (1992). Evaluation:

Diffusion energy

No data