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	hartrees
Energy at 0K	-379.224935
Energy at 298.15K
HF Energy	-378.888081
Nuclear repulsion energy	235.437884

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A_g	3150	3150	0.00
2	A_g	3139	3139	0.00
3	A_g	1737	1737	0.00
4	A_g	1502	1502	0.00
5	A_g	1432	1432	0.00
6	A_g	1278	1278	0.00
7	A_g	686	686	0.00
8	A_g	206	206	0.00
9	A_g	175	175	0.00
10	A_u	1116	1116	76.68
11	A_u	1001	1001	188.41
12	A_u	185	185	7.56
13	A_u	76	76	1.85
14	B_g	1088	1088	0.00
15	B_g	982	982	0.00
16	B_g	278	278	0.00
17	B_u	3266	3266	2094.09
18	B_u	3136	3136	462.13
19	B_u	1806	1806	692.10
20	B_u	1467	1467	0.32
21	B_u	1425	1425	55.41
22	B_u	1279	1279	320.59
23	B_u	720	720	44.68
24	B_u	278	278	68.80

Atom	x (Å)	y (Å)
C1	1.633	-0.966
C2	-1.633	0.966
O3	1.633	0.262
O4	-1.633	-0.262
O5	0.580	-1.751
O6	-0.580	1.751
H7	2.564	-1.540
H8	-2.564	1.540
H9	0.257	1.204
H10	-0.257	-1.204

	C1	C2	O3	O4	O5	O6	H7	H8	H9	H10
C1		3.7950	1.2273	3.3418	1.3135	3.5043	1.0938	4.8886	2.5693	1.9049
C2	3.7950		3.3418	1.2273	3.5043	1.3135	4.8886	1.0938	1.9049	2.5693
O3	1.2273	3.3418		3.3084	2.2712	2.6681	2.0279	4.3880	1.6682	2.3913
O4	3.3418	1.2273	3.3084		2.6681	2.2712	4.3880	2.0279	2.3913	1.6682
O5	1.3135	3.5043	2.2712	2.6681		3.6891	1.9950	4.5518	2.9721	1.0000
O6	3.5043	1.3135	2.6681	2.2712	3.6891		4.5518	1.9950	1.0000	2.9721
H7	1.0938	4.8886	2.0279	4.3880	1.9950	4.5518		5.9823	3.5850	2.8408
H8	4.8886	1.0938	4.3880	2.0279	4.5518	1.9950	5.9823		2.8408	3.5850
H9	2.5693	1.9049	1.6682	2.3913	2.9721	1.0000	3.5850	2.8408		2.4612
H10	1.9049	2.5693	2.3913	1.6682	1.0000	2.9721	2.8408	3.5850	2.4612

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	O3	H9	124.380	C1	O5	H10	110.111
C2	O4	H10	124.380	C2	O6	H9	110.111
O3	C1	O5	126.709	O3	C1	H7	121.675
O3	H9	O6	178.799	O4	C2	O6	126.709
O4	C2	H8	121.675	O4	H10	O5	178.799
O5	C1	H7	111.616	O6	C2	H8	111.616

All results from a given calculation for C₂H₄O₄ (Formic acid dimer)

using model chemistry: B2PLYP=FULLultrafine/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 C2H4O4 (Formic acid dimer)

using model chemistry: B2PLYP=FULLultrafine/6-31G**

States and conformations

All results from a given calculation for C₂H₄O₄ (Formic acid dimer)