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	hartrees
Energy at 0K	-155.463386
Energy at 298.15K	-155.469706
HF Energy	-154.870141
Nuclear repulsion energy	116.112165

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)
1	A₁	3274	3148
2	A₁	3190	3067
3	A₁	3088	2969
4	A₁	1569	1509
5	A₁	1316	1265
6	A₁	1129	1086
7	A₁	878	844
8	A₁	676	650
9	A₁	422	406
10	A₂	1214	1168
11	A₂	1112	1069
12	A₂	948	912
13	A₂	880	847
14	B₁	3262	3137
15	B₁	1197	1151
16	B₁	1162	1117
17	B₁	1021	982
18	B₁	771	741
19	B₂	3191	3069
20	B₂	3092	2973
21	B₂	1533	1474
22	B₂	1354	1302
23	B₂	1132	1088
24	B₂	973	936

Atom	x (Å)	y (Å)	z (Å)
C1	0.751	0.000	-0.314
C2	-0.751	0.000	-0.314
C3	0.000	1.136	0.312
C4	0.000	-1.136	0.312
H5	1.425	0.000	-1.162
H6	-1.425	0.000	-1.162
H7	0.000	2.085	-0.228
H8	0.000	-2.085	-0.228
H9	0.000	1.244	1.403
H10	0.000	-1.244	1.403

	C1	C2	C3	C4	H5	H6	H7	H8	H9	H10
C1		1.5012	1.4986	1.4986	1.0834	2.3351	2.2181	2.2181	2.2491	2.2491
C2	1.5012		1.4986	1.4986	2.3351	1.0834	2.2181	2.2181	2.2491	2.2491
C3	1.4986	1.4986		2.2721	2.3438	2.3438	1.0919	3.2663	1.0962	2.6182
C4	1.4986	1.4986	2.2721		2.3438	2.3438	3.2663	1.0919	2.6182	1.0962
H5	1.0834	2.3351	2.3438	2.3438		2.8505	2.6932	2.6932	3.1868	3.1868
H6	2.3351	1.0834	2.3438	2.3438	2.8505		2.6932	2.6932	3.1868	3.1868
H7	2.2181	2.2181	1.0919	3.2663	2.6932	2.6932		4.1708	1.8345	3.7072
H8	2.2181	2.2181	3.2663	1.0919	2.6932	2.6932	4.1708		3.7072	1.8345
H9	2.2491	2.2491	1.0962	2.6182	3.1868	3.1868	1.8345	3.7072		2.4882
H10	2.2491	2.2491	2.6182	1.0962	3.1868	3.1868	3.7072	1.8345	2.4882

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	C2	C3	59.943	C1	C2	C4	59.943
C1	C2	H6	128.515	C1	C3	C2	60.114
C1	C3	H7	116.922	C1	C3	H9	119.366
C1	C4	C2	60.114	C1	C4	H8	116.922
C1	C4	H10	119.366	C2	C1	C3	59.943
C2	C1	C4	59.943	C2	C1	H5	128.515
C2	C3	H7	116.922	C2	C3	H9	119.366
C2	C4	H8	116.922	C2	C4	H10	119.366
C3	C1	C4	98.588	C3	C1	H5	129.697
C3	C2	C4	98.588	C3	C2	H6	129.697
C4	C1	H5	129.697	C4	C2	H6	129.697
H7	C3	H9	113.946	H8	C4	H10	113.946

All results from a given calculation for C₄H₆ (Bicyclo[1.1.0]butane)

using model chemistry: MP4=FULL/6-31G*

States and conformations

	Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for C4H6 (Bicyclo[1.1.0]butane)

using model chemistry: MP4=FULL/6-31G*

States and conformations

All results from a given calculation for C₄H₆ (Bicyclo[1.1.0]butane)