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	hartrees
Energy at 0K	-378.575405
Energy at 298.15K	-378.581126
HF Energy	-377.568743
Counterpoise corrected energy
CP Energy at 298.15K
Counterpoise optimized geometry corrected energy
CP opt. Energy at 298.15K
Nuclear repulsion energy	233.237946

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A_g	3300	3104	0.00
2	A_g	3204	3014	0.00
3	A_g	1728	1625	0.00
4	A_g	1469	1382	0.00
5	A_g	1418	1333	0.00
6	A_g	1252	1177	0.00
7	A_g	672	632	0.00
8	A_g	191	179	0.00
9	A_g	159	149	0.00
10	A_u	1111	1045	76.63
11	A_u	972	914	189.05
12	A_u	171	161	8.68
13	A_u	67	63	2.43
14	B_g	1085	1021	0.00
15	B_g	949	893	0.00
16	B_g	246	232	0.00
17	B_u	3387	3185	1937.19
18	B_u	3201	3011	209.17
19	B_u	1783	1677	790.43
20	B_u	1458	1371	5.77
21	B_u	1402	1319	34.45
22	B_u	1256	1182	378.66
23	B_u	695	653	48.06
24	B_u	245	230	56.59

Atom	x (Å)	y (Å)
C1	1.585	-1.128
C2	-1.585	1.128
O3	1.585	0.096
O4	-1.585	-0.096
O5	0.517	-1.911
O6	-0.517	1.911
H7	2.506	-1.720
H8	-2.506	1.720
H9	0.303	1.363
H10	-0.303	-1.363

	C1	C2	O3	O4	O5	O6	H7	H8	H9	H10
C1		3.8909	1.2244	3.3337	1.3247	3.6950	1.0943	4.9843	2.8016	1.9027
C2	3.8909		3.3337	1.2244	3.6950	1.3247	4.9843	1.0943	1.9027	2.8016
O3	1.2244	3.3337		3.1759	2.2741	2.7767	2.0360	4.4010	1.8022	2.3863
O4	3.3337	1.2244	3.1759		2.7767	2.2741	4.4010	2.0360	2.3863	1.8022
O5	1.3247	3.6950	2.2741	2.7767		3.9594	1.9982	4.7240	3.2811	0.9860
O6	3.6950	1.3247	2.7767	2.2741	3.9594		4.7240	1.9982	0.9860	3.2811
H7	1.0943	4.9843	2.0360	4.4010	1.9982	4.7240		6.0780	3.7887	2.8312
H8	4.9843	1.0943	4.4010	2.0360	4.7240	1.9982	6.0780		2.8312	3.7887
H9	2.8016	1.9027	1.8022	2.3863	3.2811	0.9860	3.7887	2.8312		2.7926
H10	1.9027	2.8016	2.3863	1.8022	0.9860	3.2811	2.8312	3.7887	2.7926

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	O3	H9	134.656	C1	O5	H10	109.990
C2	O4	H10	134.656	C2	O6	H9	109.990
O3	C1	O5	126.237	O3	C1	H7	122.728
O3	H9	O6	169.117	O4	C2	O6	126.237
O4	C2	H8	122.728	O4	H10	O5	169.117
O5	C1	H7	111.035	O6	C2	H8	111.035

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

using model chemistry: MP2/6-31+G**

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: MP2/6-31+G**

States and conformations

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