CCCBDB listing of experimental data page 2

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Property	Value	Uncertainty	units	Reference	Comment
Hfg(298.15K)	385.00	15.00	kJ mol^-1	webbook
Hfg(0K)		15.00	kJ mol^-1	webbook

Mode Number	Symmetry	Frequency			Intensity			Comment	Description
Mode Number	Symmetry	Fundamental(cm^-1)	Harmonic(cm^-1)	Reference	(km mol^-1)	unc.	Reference	Comment	Description
1	A₁	2663		webbook
2	A₁	1485		webbook
3	A₁	1305		webbook
5	B₂	2606		webbook

Bond Type	Count
C=C	1
H-C	2

Atom 1	Atom 2
C1	C2
C1	H3
C1	H4

State	Config	State description	Conf description	Exp. min.	Dipole (Debye)				Reference	comment	Point Group	Components
State	Config	State description	Conf description	Exp. min.	x	y	z	total	Reference	comment	Point Group	dipole	quadrupole
1	1	²B₂	C_2v	True							C_2v	1	2

	Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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Experimental data for H2CC- (vinylidene anion)

Experimental data for H₂CC^- (vinylidene anion)