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	hartrees
Energy at 0K	-378.800185
Energy at 298.15K	-378.805960
HF Energy	-377.641436
Counterpoise corrected energy	-378.800185
CP Energy at 298.15K	-378.805960
Counterpoise optimized geometry corrected energy
CP opt. Energy at 298.15K
Nuclear repulsion energy	233.101593

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A_g	3434	3253	0.00
2	A_g	3154	2987	0.00
3	A_g	1775	1681	0.00
4	A_g	1486	1408	0.00
5	A_g	1425	1349	0.00
6	A_g	1264	1197	0.00
7	A_g	685	649	0.00
8	A_g	199	189	0.00
9	A_g	164	155	0.00
10	A_u	1110	1051	56.50
11	A_u	959	908	255.46
12	A_u	169	160	4.35
13	A_u	71	67	1.88
14	B_g	1093	1035	0.00
15	B_g	925	876	0.00
16	B_g	258	244	0.00
17	B_u	3500	3315	1387.09
18	B_u	3150	2984	175.75
19	B_u	1821	1725	726.50
20	B_u	1465	1387	0.47
21	B_u	1418	1343	37.04
22	B_u	1266	1199	394.50
23	B_u	700	663	57.07
24	B_u	250	237	43.28

Atom	x (Å)	y (Å)
C1	1.645	-1.035
C2	-1.645	1.035
O3	1.645	0.183
O4	-1.645	-0.183
O5	0.588	-1.820
O6	-0.588	1.820
H7	2.569	-1.623
H8	-2.569	1.623
H9	0.231	1.276
H10	-0.231	-1.276

	C1	C2	O3	O4	O5	O6	H7	H8	H9	H10
C1		3.8876	1.2179	3.3992	1.3169	3.6244	1.0949	4.9825	2.7095	1.8921
C2	3.8876		3.3992	1.2179	3.6244	1.3169	4.9825	1.0949	1.8921	2.7095
O3	1.2179	3.3992		3.3109	2.2647	2.7687	2.0281	4.4537	1.7874	2.3771
O4	3.3992	1.2179	3.3109		2.7687	2.2647	4.4537	2.0281	2.3771	1.7874
O5	1.3169	3.6244	2.2647	2.7687		3.8245	1.9914	4.6707	3.1163	0.9830
O6	3.6244	1.3169	2.7687	2.2647	3.8245		4.6707	1.9914	0.9830	3.1163
H7	1.0949	4.9825	2.0281	4.4537	1.9914	4.6707		6.0775	3.7241	2.8220
H8	4.9825	1.0949	4.4537	2.0281	4.6707	1.9914	6.0775		2.8220	3.7241
H9	2.7095	1.8921	1.7874	2.3771	3.1163	0.9830	3.7241	2.8220		2.5939
H10	1.8921	2.7095	2.3771	1.7874	0.9830	3.1163	2.8220	3.7241	2.5939

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	O3	H9	127.711	C1	O5	H10	109.859
C2	O4	H10	127.711	C2	O6	H9	109.859
O3	C1	O5	126.572	O3	C1	H7	122.446
O3	H9	O6	175.857	O4	C2	O6	126.572
O4	C2	H8	122.446	O4	H10	O5	175.857
O5	C1	H7	110.982	O6	C2	H8	110.982

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

using model chemistry: MP2=FULL/6-311G*

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/6-311G*

States and conformations

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