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	hartrees
Energy at 0K	-378.777543
Energy at 298.15K	-378.783445
HF Energy	-377.589266
Counterpoise corrected energy
CP Energy at 298.15K
Counterpoise optimized geometry corrected energy
CP opt. Energy at 298.15K
Nuclear repulsion energy	235.878544

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A_g	3202	3024	0.00
2	A_g	3141	2967	0.00
3	A_g	1756	1658	0.00
4	A_g	1498	1415	0.00
5	A_g	1430	1350	0.00
6	A_g	1274	1203	0.00
7	A_g	687	649	0.00
8	A_g	207	196	0.00
9	A_g	171	161	0.00
10	A_u	1123	1061	44.14
11	A_u	985	930	160.48
12	A_u	177	167	6.55
13	A_u	72	68	1.65
14	B_g	1101	1040	0.00
15	B_g	965	911	0.00
16	B_g	274	259	0.00
17	B_u	3316	3132	2112.60
18	B_u	3136	2962	300.00
19	B_u	1819	1718	641.53
20	B_u	1472	1390	0.53
21	B_u	1423	1344	42.98
22	B_u	1277	1206	312.50
23	B_u	719	679	40.17
24	B_u	278	263	63.94

Atom	x (Å)	y (Å)
C1	1.571	-1.115
C2	-1.571	1.115
O3	1.571	0.098
O4	-1.571	-0.098
O5	0.519	-1.903
O6	-0.519	1.903
H7	2.495	-1.706
H8	-2.495	1.706
H9	0.289	1.347
H10	-0.289	-1.347

	C1	C2	O3	O4	O5	O6	H7	H8	H9	H10
C1		3.8523	1.2128	3.3022	1.3148	3.6709	1.0968	4.9482	2.7750	1.8746
C2	3.8523		3.3022	1.2128	3.6709	1.3148	4.9482	1.0968	1.8746	2.7750
O3	1.2128	3.3022		3.1480	2.2611	2.7616	2.0268	4.3720	1.7893	2.3554
O4	3.3022	1.2128	3.1480		2.7616	2.2611	4.3720	2.0268	2.3554	1.7893
O5	1.3148	3.6709	2.2611	2.7616		3.9457	1.9855	4.7020	3.2582	0.9814
O6	3.6709	1.3148	2.7616	2.2611	3.9457		4.7020	1.9855	0.9814	3.2582
H7	1.0968	4.9482	2.0268	4.3720	1.9855	4.7020		6.0444	3.7660	2.8070
H8	4.9482	1.0968	4.3720	2.0268	4.7020	1.9855	6.0444		2.8070	3.7660
H9	2.7750	1.8746	1.7893	2.3554	3.2582	0.9814	3.7660	2.8070		2.7549
H10	1.8746	2.7750	2.3554	1.7893	0.9814	3.2582	2.8070	3.7660	2.7549

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	O3	H9	134.249	C1	O5	H10	108.583
C2	O4	H10	134.249	C2	O6	H9	108.583
O3	C1	O5	126.864	O3	C1	H7	122.621
O3	H9	O6	170.304	O4	C2	O6	126.864
O4	C2	H8	122.621	O4	H10	O5	170.304
O5	C1	H7	110.515	O6	C2	H8	110.515

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

using model chemistry: MP2/6-31G(2df,p)

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(2df,p)

States and conformations

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