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	hartrees
Energy at 0K	-378.533306
Energy at 298.15K	-378.539132
HF Energy	-377.541589
Counterpoise corrected energy	-378.533306
CP Energy at 298.15K	-378.539132
Counterpoise optimized geometry corrected energy
CP opt. Energy at 298.15K
Nuclear repulsion energy	232.634682

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A_g	3281	3091	0.00
2	A_g	3181	2998	0.00
3	A_g	1773	1671	0.00
4	A_g	1491	1405	0.00
5	A_g	1438	1355	0.00
6	A_g	1267	1194	0.00
7	A_g	680	641	0.00
8	A_g	206	194	0.00
9	A_g	168	158	0.00
10	A_u	1114	1049	62.22
11	A_u	975	919	240.90
12	A_u	176	166	5.95
13	A_u	72	67	1.78
14	B_g	1092	1029	0.00
15	B_g	948	893	0.00
16	B_g	270	255	0.00
17	B_u	3367	3173	1723.23
18	B_u	3177	2993	250.85
19	B_u	1825	1719	653.59
20	B_u	1470	1385	1.10
21	B_u	1423	1341	43.74
22	B_u	1269	1196	365.60
23	B_u	703	663	52.89
24	B_u	265	250	48.77

Atom	x (Å)	y (Å)
C1	1.660	-1.005
C2	-1.660	1.005
O3	1.660	0.223
O4	-1.660	-0.223
O5	0.600	-1.795
O6	-0.600	1.795
H7	2.586	-1.588
H8	-2.586	1.588
H9	0.229	1.236
H10	-0.229	-1.236

	C1	C2	O3	O4	O5	O6	H7	H8	H9	H10
C1		3.8806	1.2279	3.4103	1.3214	3.5979	1.0947	4.9752	2.6589	1.9033
C2	3.8806		3.4103	1.2279	3.5979	1.3214	4.9752	1.0947	1.9033	2.6589
O3	1.2279	3.4103		3.3492	2.2788	2.7527	2.0340	4.4601	1.7530	2.3871
O4	3.4103	1.2279	3.3492		2.7527	2.2788	4.4601	2.0340	2.3871	1.7530
O5	1.3214	3.5979	2.2788	2.7527		3.7846	1.9970	4.6470	3.0536	0.9999
O6	3.5979	1.3214	2.7527	2.2788	3.7846		4.6470	1.9970	0.9999	3.0536
H7	1.0947	4.9752	2.0340	4.4601	1.9970	4.6470		6.0698	3.6785	2.8377
H8	4.9752	1.0947	4.4601	2.0340	4.6470	1.9970	6.0698		2.8377	3.6785
H9	2.6589	1.9033	1.7530	2.3871	3.0536	0.9999	3.6785	2.8377		2.5151
H10	1.9033	2.6589	2.3871	1.7530	0.9999	3.0536	2.8377	3.6785	2.5151

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	O3	H9	125.324	C1	O5	H10	109.375
C2	O4	H10	125.324	C2	O6	H9	109.375
O3	C1	O5	126.693	O3	C1	H7	122.160
O3	H9	O6	178.608	O4	C2	O6	126.693
O4	C2	H8	122.160	O4	H10	O5	178.608
O5	C1	H7	111.147	O6	C2	H8	111.147

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

using model chemistry: MP2=FULL/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=FULL/6-31G*

States and conformations

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