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	hartrees
Energy at 0K	-378.597815
Energy at 298.15K	-378.603567
HF Energy	-377.569127
Counterpoise corrected energy	-378.597815
CP Energy at 298.15K	-378.603567
Counterpoise optimized geometry corrected energy
CP opt. Energy at 298.15K
Nuclear repulsion energy	233.581491

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A_g	3288	3088	0.00
2	A_g	3206	3012	0.00
3	A_g	1731	1626	0.00
4	A_g	1472	1383	0.00
5	A_g	1421	1334	0.00
6	A_g	1255	1179	0.00
7	A_g	674	633	0.00
8	A_g	193	181	0.00
9	A_g	160	150	0.00
10	A_u	1116	1048	84.42
11	A_u	983	924	180.82
12	A_u	174	164	8.99
13	A_u	69	65	2.39
14	B_g	1089	1022	0.00
15	B_g	962	904	0.00
16	B_g	249	234	0.00
17	B_u	3377	3172	1960.79
18	B_u	3203	3008	221.62
19	B_u	1787	1678	794.37
20	B_u	1460	1372	5.17
21	B_u	1406	1321	34.92
22	B_u	1260	1183	378.50
23	B_u	697	655	47.38
24	B_u	247	232	57.67

Atom	x (Å)	y (Å)
C1	1.636	-1.016
C2	-1.636	1.016
O3	1.636	0.215
O4	-1.636	-0.215
O5	0.569	-1.798
O6	-0.569	1.798
H7	2.558	-1.597
H8	-2.558	1.597
H9	0.255	1.239
H10	-0.255	-1.239

	C1	C2	O3	O4	O5	O6	H7	H8	H9	H10
C1		3.8512	1.2310	3.3681	1.3224	3.5747	1.0898	4.9410	2.6447	1.9036
C2	3.8512		3.3681	1.2310	3.5747	1.3224	4.9410	1.0898	1.9036	2.6447
O3	1.2310	3.3681		3.2996	2.2778	2.7141	2.0330	4.4154	1.7196	2.3852
O4	3.3681	1.2310	3.2996		2.7141	2.2778	4.4154	2.0330	2.3852	1.7196
O5	1.3224	3.5747	2.2778	2.7141		3.7712	1.9989	4.6153	3.0534	0.9951
O6	3.5747	1.3224	2.7141	2.2778	3.7712		4.6153	1.9989	0.9951	3.0534
H7	1.0898	4.9410	2.0330	4.4154	1.9989	4.6153		6.0308	3.6537	2.8351
H8	4.9410	1.0898	4.4154	2.0330	4.6153	1.9989	6.0308		2.8351	3.6537
H9	2.6447	1.9036	1.7196	2.3852	3.0534	0.9951	3.6537	2.8351		2.5307
H10	1.9036	2.6447	2.3852	1.7196	0.9951	3.0534	2.8351	3.6537	2.5307

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	O3	H9	126.570	C1	O5	H10	109.644
C2	O4	H10	126.570	C2	O6	H9	109.644
O3	C1	O5	126.234	O3	C1	H7	122.206
O3	H9	O6	177.552	O4	C2	O6	126.234
O4	C2	H8	122.206	O4	H10	O5	177.552
O5	C1	H7	111.559	O6	C2	H8	111.559

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

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

States and conformations

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