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	hartrees
Energy at 0K	-378.571129
Energy at 298.15K	-378.576994
HF Energy	-377.558307
Counterpoise corrected energy	-378.571129
CP Energy at 298.15K	-378.576994
Counterpoise optimized geometry corrected energy
CP opt. Energy at 298.15K
Nuclear repulsion energy	234.258228

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A_g	3291	3075	0.00
2	A_g	3197	2987	0.00
3	A_g	1768	1652	0.00
4	A_g	1502	1403	0.00
5	A_g	1444	1349	0.00
6	A_g	1276	1193	0.00
7	A_g	682	637	0.00
8	A_g	197	184	0.00
9	A_g	169	158	0.00
10	A_u	1127	1053	75.32
11	A_u	998	933	204.19
12	A_u	182	170	6.83
13	A_u	73	68	1.71
14	B_g	1100	1028	0.00
15	B_g	976	912	0.00
16	B_g	276	258	0.00
17	B_u	3393	3170	1953.48
18	B_u	3192	2982	273.41
19	B_u	1825	1706	656.04
20	B_u	1475	1379	0.37
21	B_u	1430	1336	45.68
22	B_u	1279	1195	348.15
23	B_u	711	664	48.65
24	B_u	262	245	58.90

Atom	x (Å)	y (Å)
C1	1.641	-0.986
C2	-1.641	0.986
O3	1.641	0.243
O4	-1.641	-0.243
O5	0.584	-1.774
O6	-0.584	1.774
H7	2.566	-1.563
H8	-2.566	1.563
H9	0.242	1.221
H10	-0.242	-1.221

	C1	C2	O3	O4	O5	O6	H7	H8	H9	H10
C1		3.8283	1.2286	3.3646	1.3184	3.5452	1.0907	4.9188	2.6129	1.8973
C2	3.8283		3.3646	1.2286	3.5452	1.3184	4.9188	1.0907	1.8973	2.6129
O3	1.2286	3.3646		3.3173	2.2772	2.7011	2.0294	4.4092	1.7071	2.3849
O4	3.3646	1.2286	3.3173		2.7011	2.2772	4.4092	2.0294	2.3849	1.7071
O5	1.3184	3.5452	2.2772	2.7011		3.7360	1.9930	4.5895	3.0149	0.9941
O6	3.5452	1.3184	2.7011	2.2772	3.7360		4.5895	1.9930	0.9941	3.0149
H7	1.0907	4.9188	2.0294	4.4092	1.9930	4.5895		6.0094	3.6270	2.8286
H8	4.9188	1.0907	4.4092	2.0294	4.5895	1.9930	6.0094		2.8286	3.6270
H9	2.6129	1.8973	1.7071	2.3849	3.0149	0.9941	3.6270	2.8286		2.4897
H10	1.8973	2.6129	2.3849	1.7071	0.9941	3.0149	2.8286	3.6270	2.4897

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	O3	H9	124.964	C1	O5	H10	109.455
C2	O4	H10	124.964	C2	O6	H9	109.455
O3	C1	O5	126.735	O3	C1	H7	121.976
O3	H9	O6	178.846	O4	C2	O6	126.735
O4	C2	H8	121.976	O4	H10	O5	178.846
O5	C1	H7	111.290	O6	C2	H8	111.290

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)