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	hartrees
Energy at 0K	-378.512659
Energy at 298.15K	-378.518462
HF Energy	-377.541224
Counterpoise corrected energy
CP Energy at 298.15K
Counterpoise optimized geometry corrected energy
CP opt. Energy at 298.15K
Nuclear repulsion energy	232.397003

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A_g	3286	3099	0.00
2	A_g	3180	2999	0.00
3	A_g	1770	1669	0.00
4	A_g	1489	1404	0.00
5	A_g	1437	1355	0.00
6	A_g	1265	1193	0.00
7	A_g	678	640	0.00
8	A_g	204	193	0.00
9	A_g	167	158	0.00
10	A_u	1110	1047	57.09
11	A_u	965	910	246.32
12	A_u	173	163	5.70
13	A_u	71	67	1.78
14	B_g	1090	1028	0.00
15	B_g	936	883	0.00
16	B_g	267	252	0.00
17	B_u	3371	3179	1708.63
18	B_u	3176	2995	244.27
19	B_u	1821	1717	650.96
20	B_u	1469	1386	1.47
21	B_u	1421	1340	43.22
22	B_u	1266	1194	365.38
23	B_u	701	661	53.16
24	B_u	263	248	48.18

Atom	x (Å)	y (Å)
C1	1.587	-1.125
C2	-1.587	1.125
O3	1.587	0.098
O4	-1.587	-0.098
O5	0.525	-1.914
O6	-0.525	1.914
H7	2.512	-1.717
H8	-2.512	1.717
H9	0.297	1.361
H10	-0.297	-1.361

	C1	C2	O3	O4	O5	O6	H7	H8	H9	H10
C1		3.8907	1.2226	3.3364	1.3233	3.7008	1.0981	4.9878	2.8004	1.8992
C2	3.8907		3.3364	1.2226	3.7008	1.3233	4.9878	1.0981	1.8992	2.8004
O3	1.2226	3.3364		3.1804	2.2750	2.7857	2.0368	4.4073	1.8053	2.3831
O4	3.3364	1.2226	3.1804		2.7857	2.2750	4.4073	2.0368	2.3831	1.8053
O5	1.3233	3.7008	2.2750	2.7857		3.9695	1.9966	4.7336	3.2828	0.9911
O6	3.7008	1.3233	2.7857	2.2750	3.9695		4.7336	1.9966	0.9911	3.2828
H7	1.0981	4.9878	2.0368	4.4073	1.9966	4.7336		6.0853	3.7917	2.8317
H8	4.9878	1.0981	4.4073	2.0368	4.7336	1.9966	6.0853		2.8317	3.7917
H9	2.8004	1.8992	1.8053	2.3831	3.2828	0.9911	3.7917	2.8317		2.7859
H10	1.8992	2.8004	2.3831	1.8053	0.9911	3.2828	2.8317	3.7917	2.7859

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	O3	H9	134.398	C1	O5	H10	109.456
C2	O4	H10	134.398	C2	O6	H9	109.456
O3	C1	O5	126.614	O3	C1	H7	122.636
O3	H9	O6	169.533	O4	C2	O6	126.614
O4	C2	H8	122.636	O4	H10	O5	169.533
O5	C1	H7	110.751	O6	C2	H8	110.751

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)