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	hartrees
Energy at 0K	-351.160581
Energy at 298.15K
HF Energy	-350.231016
Nuclear repulsion energy	165.531996

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ_g	2508	2401	0.00
2	Σ_g	1433	1372	0.00
3	Σ_g	551	527	0.00
4	Σ_u	2377	2275	343.55
5	Σ_u	1084	1038	287.43
6	Π_g	328	314	0.00
6	Π_g	328	314	0.00
7	Π_g	247	237	0.00
7	Π_g	247	237	0.00
8	Π_u	377	361	3.78
8	Π_u	377	361	3.78
9	Π_u	107	103	0.39
9	Π_u	107	103	0.39

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.694
C2	0.000	0.000	-0.694
C3	0.000	0.000	1.898
C4	0.000	0.000	-1.898
F5	0.000	0.000	3.178
F6	0.000	0.000	-3.178

	C1	C2	C3	C4	F5	F6
C1		1.3874	1.2038	2.5912	2.4838	3.8712
C2	1.3874		2.5912	1.2038	3.8712	2.4838
C3	1.2038	2.5912		3.7950	1.2800	5.0750
C4	2.5912	1.2038	3.7950		5.0750	1.2800
F5	2.4838	3.8712	1.2800	5.0750		6.3550
F6	3.8712	2.4838	5.0750	1.2800	6.3550

atom1	atom2	atom3	angle		atom1	atom2	atom3	angle
C1	C2	C4	180.000		C1	C3	F5	180.000
C2	C1	C3	180.000		C2	C4	F6	180.000

All results from a given calculation for C₄F₂ (difluorobutadiyne)

using model chemistry: QCISD/6-311G*

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 C4F2 (difluorobutadiyne)

using model chemistry: QCISD/6-311G*

States and conformations

All results from a given calculation for C₄F₂ (difluorobutadiyne)