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	hartrees
Energy at 0K	-378.969537
Energy at 298.15K	-378.975490
HF Energy	-377.700663
Counterpoise corrected energy
CP Energy at 298.15K
Counterpoise optimized geometry corrected energy
CP opt. Energy at 298.15K
Nuclear repulsion energy	236.408137

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A_g	3141	2982	0.00
2	A_g	3115	2957	0.00
3	A_g	1721	1634	0.00
4	A_g	1496	1420	0.00
5	A_g	1422	1350	0.00
6	A_g	1270	1206	0.00
7	A_g	690	655	0.00
8	A_g	214	203	0.00
9	A_g	172	163	0.00
10	A_u	1125	1069	69.51
11	A_u	1006	955	127.58
12	A_u	184	175	9.02
13	A_u	69	65	1.87
14	B_g	1098	1042	0.00
15	B_g	989	939	0.00
16	B_g	270	257	0.00
17	B_u	3245	3081	2180.24
18	B_u	3129	2971	482.20
19	B_u	1793	1702	704.20
20	B_u	1466	1392	1.57
21	B_u	1417	1346	35.67
22	B_u	1274	1210	327.17
23	B_u	723	687	40.28
24	B_u	288	273	70.90

Atom	x (Å)	y (Å)
C1	1.575	-1.120
C2	-1.575	1.120
O3	1.575	0.093
O4	-1.575	-0.093
O5	0.515	-1.900
O6	-0.515	1.900
H7	2.495	-1.711
H8	-2.495	1.711
H9	0.292	1.340
H10	-0.292	-1.340

	C1	C2	O3	O4	O5	O6	H7	H8	H9	H10
C1		3.8653	1.2131	3.3134	1.3162	3.6722	1.0935	4.9578	2.7740	1.8803
C2	3.8653		3.3134	1.2131	3.6722	1.3162	4.9578	1.0935	1.8803	2.7740
O3	1.2131	3.3134		3.1560	2.2575	2.7624	2.0253	4.3799	1.7887	2.3540
O4	3.3134	1.2131	3.1560		2.7624	2.2575	4.3799	2.0253	2.3540	1.7887
O5	1.3162	3.6722	2.2575	2.7624		3.9363	1.9891	4.7006	3.2470	0.9822
O6	3.6722	1.3162	2.7624	2.2575	3.9363		4.7006	1.9891	0.9822	3.2470
H7	1.0935	4.9578	2.0253	4.3799	1.9891	4.7006		6.0507	3.7629	2.8118
H8	4.9578	1.0935	4.3799	2.0253	4.7006	1.9891	6.0507		2.8118	3.7629
H9	2.7740	1.8803	1.7887	2.3540	3.2470	0.9822	3.7629	2.8118		2.7426
H10	1.8803	2.7740	2.3540	1.7887	0.9822	3.2470	2.8118	3.7629	2.7426

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	O3	H9	134.168	C1	O5	H10	108.920
C2	O4	H10	134.168	C2	O6	H9	108.920
O3	C1	O5	126.336	O3	C1	H7	122.733
O3	H9	O6	170.576	O4	C2	O6	126.336
O4	C2	H8	122.733	O4	H10	O5	170.576
O5	C1	H7	110.931	O6	C2	H8	110.931

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

using model chemistry: MP2/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/cc-pVTZ

States and conformations

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