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	hartrees
Energy at 0K	-379.053818
Energy at 298.15K	-379.059816
HF Energy	-377.701870
Counterpoise corrected energy	-379.053818
CP Energy at 298.15K	-379.059816
Counterpoise optimized geometry corrected energy
CP opt. Energy at 298.15K
Nuclear repulsion energy	237.053367

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A_g	3151	2992	0.00
2	A_g	3129	2971	0.00
3	A_g	1732	1644	0.00
4	A_g	1502	1426	0.00
5	A_g	1434	1362	0.00
6	A_g	1279	1214	0.00
7	A_g	697	661	0.00
8	A_g	216	205	0.00
9	A_g	172	164	0.00
10	A_u	1140	1083	72.38
11	A_u	1028	976	125.12
12	A_u	189	180	9.26
13	A_u	71	67	1.89
14	B_g	1113	1057	0.00
15	B_g	1008	957	0.00
16	B_g	275	261	0.00
17	B_u	3261	3096	2223.40
18	B_u	3139	2981	452.58
19	B_u	1804	1713	710.76
20	B_u	1473	1399	1.90
21	B_u	1428	1356	37.03
22	B_u	1283	1218	327.95
23	B_u	729	692	40.19
24	B_u	290	276	71.40

Atom	x (Å)	y (Å)
C1	1.626	-0.955
C2	-1.626	0.955
O3	1.626	0.264
O4	-1.626	-0.264
O5	0.575	-1.733
O6	-0.575	1.733
H7	2.550	-1.527
H8	-2.550	1.527
H9	0.252	1.176
H10	-0.252	-1.176

	C1	C2	O3	O4	O5	O6	H7	H8	H9	H10
C1		3.7705	1.2189	3.3239	1.3071	3.4736	1.0869	4.8572	2.5352	1.8912
C2	3.7705		3.3239	1.2189	3.4736	1.3071	4.8572	1.0869	1.8912	2.5352
O3	1.2189	3.3239		3.2942	2.2563	2.6459	2.0153	4.3622	1.6486	2.3671
O4	3.3239	1.2189	3.2942		2.6459	2.2563	4.3622	2.0153	2.3671	1.6486
O5	1.3071	3.4736	2.2563	2.6459		3.6513	1.9852	4.5155	2.9269	0.9973
O6	3.4736	1.3071	2.6459	2.2563	3.6513		4.5155	1.9852	0.9973	2.9269
H7	1.0869	4.8572	2.0153	4.3622	1.9852	4.5155		5.9439	3.5475	2.8240
H8	4.8572	1.0869	4.3622	2.0153	4.5155	1.9852	5.9439		2.8240	3.5475
H9	2.5352	1.8912	1.6486	2.3671	2.9269	0.9973	3.5475	2.8240		2.4063
H10	1.8912	2.5352	2.3671	1.6486	0.9973	2.9269	2.8240	3.5475	2.4063

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	O3	H9	123.589	C1	O5	H10	109.573
C2	O4	H10	123.589	C2	O6	H9	109.573
O3	C1	O5	126.529	O3	C1	H7	121.761
O3	H9	O6	179.691	O4	C2	O6	126.529
O4	C2	H8	121.761	O4	H10	O5	179.691
O5	C1	H7	111.710	O6	C2	H8	111.710

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

using model chemistry: MP2=FULL/cc-pVTZ

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=FULL/cc-pVTZ

States and conformations

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