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	hartrees
Energy at 0K	-76.780688
Energy at 298.15K	-76.780625
Nuclear repulsion energy	24.027364

	hartrees
Energy at 0K	-76.749311
Energy at 298.15K	-76.749413
HF Energy	-76.749311
Nuclear repulsion energy	23.391748

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁	3230	2764	12.78
2	A₁	1591	1361	0.00
3	A₁	1399	1197	9.95
4	B₁	849	727	40.22
5	B₂	3313	2834	15.18
6	B₂	1088	931	0.77

Atom	y (Å)	z (Å)
C1	0.000	-0.494
C2	0.000	0.846
H3	0.922	-1.055
H4	-0.922	-1.055

	C1	C2	H3	H4
C1		1.3400	1.0794	1.0794
C2	1.3400		2.1129	2.1129
H3	1.0794	2.1129		1.8443
H4	1.0794	2.1129	1.8443

All results from a given calculation for CCH₂ (vinylidene)

using model chemistry: ROHF/6-311G*

States and conformations

State 1 (¹A₁)

State 2 (³B₂)

	Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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Number	Element	Mulliken
1	C	-0.430
2	C	-0.032
3	H	0.231
4	H	0.231

	x	y	z	Total
	0.000	0.000	-0.509	0.509
CHELPG
AIM
ESP

<r²>	17.451
(<r²>)^1/2	4.177

All results from a given calculation for CCH2 (vinylidene)

using model chemistry: ROHF/6-311G*

States and conformations

State 1 (1A1)

State 2 (3B2)

All results from a given calculation for CCH₂ (vinylidene)

State 1 (¹A₁)

State 2 (³B₂)