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	hartrees
Energy at 0K	-351.003326
Energy at 298.15K
HF Energy	-350.235169
Nuclear repulsion energy	167.327326

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	Σ_g	2635	2438	0.00
2	Σ_g	1493	1381	0.00
3	Σ_g	576	533	0.00
4	Σ_u	2503	2316	417.15
5	Σ_u	1142	1057	336.07
6	Π_g	431	398	0.00
6	Π_g	431	398	0.00
7	Π_g	348	322	0.00
7	Π_g	348	322	0.00
8	Π_u	462	428	6.29
8	Π_u	462	428	6.29
9	Π_u	117	108	0.36
9	Π_u	117	108	0.36

Atom	x (Å)	y (Å)	z (Å)
C1	0.000	0.000	0.691
C2	0.000	0.000	-0.691
C3	0.000	0.000	1.878
C4	0.000	0.000	-1.878
F5	0.000	0.000	3.144
F6	0.000	0.000	-3.144

	C1	C2	C3	C4	F5	F6
C1		1.3822	1.1869	2.5691	2.4529	3.8351
C2	1.3822		2.5691	1.1869	3.8351	2.4529
C3	1.1869	2.5691		3.7560	1.2660	5.0220
C4	2.5691	1.1869	3.7560		5.0220	1.2660
F5	2.4529	3.8351	1.2660	5.0220		6.2880
F6	3.8351	2.4529	5.0220	1.2660	6.2880

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: CISD/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: CISD/6-311G*

States and conformations

All results from a given calculation for C₄F₂ (difluorobutadiyne)