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	hartrees
Energy at 0K	-277.782651
Energy at 298.15K
HF Energy	-277.013873
Nuclear repulsion energy	127.478130

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A	3111	3111	13.57
2	A	3054	3054	35.02
3	A	1480	1480	2.04
4	A	1445	1445	12.91
5	A	1299	1299	2.71
6	A	1144	1144	61.55
7	A	1126	1126	23.65
8	A	887	887	27.56
9	A	326	326	0.31
10	A	154	154	3.76
11	B	3124	3124	29.19
12	B	3045	3045	10.16
13	B	1474	1474	6.03
14	B	1393	1393	10.10
15	B	1259	1259	7.26
16	B	1098	1098	51.74
17	B	911	911	42.02
18	B	499	499	16.31

Atom	x (Å)	y (Å)	z (Å)
C1	0.269	0.704	0.514
C2	-0.269	-0.704	0.514
F3	-0.269	1.417	-0.549
F4	0.269	-1.417	-0.549
H5	-0.013	1.214	1.454
H6	1.368	0.699	0.406
H7	0.013	-1.214	1.454
H8	-1.368	-0.699	0.406

	C1	C2	F3	F4	H5	H6	H7	H8
C1		1.5078	1.3886	2.3731	1.1054	1.1045	2.1511	2.1586
C2	1.5078		2.3731	1.3886	2.1511	2.1586	1.1054	1.1045
F3	1.3886	2.3731		2.8850	2.0296	2.0268	3.3186	2.5683
F4	2.3731	1.3886	2.8850		3.3186	2.5683	2.0296	2.0268
H5	1.1054	2.1511	2.0296	3.3186		1.8086	2.4275	2.5675
H6	1.1045	2.1586	2.0268	2.5683	1.8086		2.5675	3.0722
H7	2.1511	1.1054	3.3186	2.0296	2.4275	2.5675		1.8086
H8	2.1586	1.1045	2.5683	2.0268	2.5675	3.0722	1.8086

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	C2	F4	109.965	C1	C2	H7	109.849
C1	C2	H8	110.494	C2	C1	F3	109.965
C2	C1	H5	109.849	C2	C1	H6	110.494
F3	C1	H5	108.401	F3	C1	H6	108.230
F4	C2	H7	108.401	F4	C2	H8	108.230
H5	C1	H6	109.858	H7	C2	H8	109.858

All results from a given calculation for C₂H₄F₂ (1,2-difluoroethane)

using model chemistry: CCSD=FULL/Sadlej_pVTZ

States and conformations

Conformer 1 (C2H anti)

Conformer 2 (C2 gauche)

	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 C2H4F2 (1,2-difluoroethane)

using model chemistry: CCSD=FULL/Sadlej_pVTZ

States and conformations

Conformer 1 (C2H anti)

Conformer 2 (C2 gauche)

All results from a given calculation for C₂H₄F₂ (1,2-difluoroethane)