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	hartrees
Energy at 0K	-351.039957
Energy at 298.15K
HF Energy	-350.160365
Nuclear repulsion energy	164.025856

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ_g	2492	2391	0.00
2	Σ_g	1421	1363	0.00
3	Σ_g	551	528	0.00
4	Σ_u	2366	2270	311.20
5	Σ_u	1074	1030	281.25
6	Π_g	445	427	0.00
6	Π_g	445	427	0.00
7	Π_g	317	304	0.00
7	Π_g	317	304	0.00
8	Π_u	378	362	3.34
8	Π_u	378	362	3.34
9	Π_u	110	105	0.36
9	Π_u	110	105	0.36

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.699
C2	0.000	0.000	-0.699
C3	0.000	0.000	1.916
C4	0.000	0.000	-1.916
F5	0.000	0.000	3.207
F6	0.000	0.000	-3.207

	C1	C2	C3	C4	F5	F6
C1		1.3979	1.2169	2.6148	2.5076	3.9055
C2	1.3979		2.6148	1.2169	3.9055	2.5076
C3	1.2169	2.6148		3.8316	1.2907	5.1224
C4	2.6148	1.2169	3.8316		5.1224	1.2907
F5	2.5076	3.9055	1.2907	5.1224		6.4131
F6	3.9055	2.5076	5.1224	1.2907	6.4131

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/cc-pVDZ

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/cc-pVDZ

States and conformations

All results from a given calculation for C₄F₂ (difluorobutadiyne)