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	hartrees
Energy at 0K	-378.044177
Energy at 298.15K	-378.049895
HF Energy	-377.350535
Counterpoise corrected energy
CP Energy at 298.15K
Counterpoise optimized geometry corrected energy
CP opt. Energy at 298.15K
Nuclear repulsion energy	228.211474

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A_g	3234	3094	0.00
2	A_g	3203	3064	0.00
3	A_g	1636	1565	0.00
4	A_g	1458	1395	0.00
5	A_g	1409	1348	0.00
6	A_g	1171	1120	0.00
7	A_g	647	619	0.00
8	A_g	198	189	0.00
9	A_g	162	155	0.00
10	A_u	1096	1049	139.08
11	A_u	937	897	321.88
12	A_u	172	165	7.36
13	A_u	81	78	1.10
14	B_g	1070	1023	0.00
15	B_g	918	879	0.00
16	B_g	257	246	0.00
17	B_u	3310	3167	1227.16
18	B_u	3203	3065	287.54
19	B_u	1664	1592	518.78
20	B_u	1450	1387	9.19
21	B_u	1403	1342	85.62
22	B_u	1169	1119	405.33
23	B_u	665	636	45.18
24	B_u	250	239	45.11

Atom	x (Å)	y (Å)
C1	1.618	-1.105
C2	-1.618	1.105
O3	1.618	0.140
O4	-1.618	-0.140
O5	0.525	-1.900
O6	-0.525	1.900
H7	2.539	-1.696
H8	-2.539	1.696
H9	0.344	1.414
H10	-0.344	-1.414

	C1	C2	O3	O4	O5	O6	H7	H8	H9	H10
C1		3.9188	1.2454	3.3766	1.3509	3.6910	1.0944	5.0128	2.8233	1.9859
C2	3.9188		3.3766	1.2454	3.6910	1.3509	5.0128	1.0944	1.9859	2.8233
O3	1.2454	3.3766		3.2478	2.3140	2.7730	2.0540	4.4387	1.8017	2.5028
O4	3.3766	1.2454	3.2478		2.7730	2.3140	4.4387	2.0540	2.5028	1.8017
O5	1.3509	3.6910	2.3140	2.7730		3.9420	2.0245	4.7242	3.3188	0.9956
O6	3.6910	1.3509	2.7730	2.3140	3.9420		4.7242	2.0245	0.9956	3.3188
H7	1.0944	5.0128	2.0540	4.4387	2.0245	4.7242		6.1069	3.8067	2.8970
H8	5.0128	1.0944	4.4387	2.0540	4.7242	2.0245	6.1069		2.8970	3.8067
H9	2.8233	1.9859	1.8017	2.5028	3.3188	0.9956	3.8067	2.8970		2.9106
H10	1.9859	2.8233	2.5028	1.8017	0.9956	3.3188	2.8970	3.8067	2.9106

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	O3	H9	135.000	C1	O5	H10	114.786
C2	O4	H10	135.000	C2	O6	H9	114.786
O3	C1	O5	126.020	O3	C1	H7	122.639
O3	H9	O6	164.194	O4	C2	O6	126.020
O4	C2	H8	122.639	O4	H10	O5	164.194
O5	C1	H7	111.342	O6	C2	H8	111.342

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

using model chemistry: MP2/6-31G

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: MP2/6-31G

States and conformations

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