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	hartrees
Energy at 0K	-372.795133
Energy at 298.15K	-372.801436
HF Energy	-372.448131
Counterpoise corrected energy	-372.795133
CP Energy at 298.15K	-372.801436
Counterpoise optimized geometry corrected energy
CP opt. Energy at 298.15K
Nuclear repulsion energy	237.100732

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A_g	3366	2992	0.00
2	A_g	2618	2327	0.00
3	A_g	1843	1638	0.00
4	A_g	1616	1436	0.00
5	A_g	1475	1312	0.00
6	A_g	1350	1200	0.00
7	A_g	680	604	0.00
8	A_g	340	302	0.00
9	A_g	194	172	0.00
10	A_u	1412	1255	185.20
11	A_u	969	861	16.98
12	A_u	239	212	2.34
13	A_u	89	79	0.00
14	B_g	1399	1244	0.00
15	B_g	1000	889	0.00
16	B_g	332	295	0.00
17	B_u	3369	2995	71.03
18	B_u	3218	2860	5207.20
19	B_u	1905	1693	214.41
20	B_u	1786	1587	37.36
21	B_u	1499	1332	30.76
22	B_u	1332	1184	114.43
23	B_u	762	677	10.58
24	B_u	583	518	104.76

Atom	x (Å)	y (Å)
C1	1.911	-0.289
C2	-1.911	0.289
O3	1.335	0.819
O4	-1.335	-0.819
O5	1.335	-1.520
O6	-1.335	1.520
H7	3.025	-0.402
H8	-3.025	0.402
H9	-0.336	1.394
H10	0.336	-1.394

	C1	C2	O3	O4	O5	O6	H7	H8	H9	H10
C1		3.8660	1.2487	3.2891	1.3598	3.7162	1.1192	4.9842	2.8079	1.9239
C2	3.8660		3.2891	1.2487	3.7162	1.3598	4.9842	1.1192	1.9239	2.8079
O3	1.2487	3.2891		3.1318	2.3391	2.7602	2.0850	4.3794	1.7674	2.4276
O4	3.2891	1.2487	3.1318		2.7602	2.3391	4.3794	2.0850	2.4276	1.7674
O5	1.3598	3.7162	2.3391	2.7602		4.0463	2.0263	4.7647	3.3595	1.0063
O6	3.7162	1.3598	2.7602	2.3391	4.0463		4.7647	2.0263	1.0063	3.3595
H7	1.1192	4.9842	2.0850	4.3794	2.0263	4.7647		6.1027	3.8111	2.8653
H8	4.9842	1.1192	4.3794	2.0850	4.7647	2.0263	6.1027		2.8653	3.8111
H9	2.8079	1.9239	1.7674	2.4276	3.3595	1.0063	3.8111	2.8653		2.8680
H10	1.9239	2.8079	2.4276	1.7674	1.0063	3.3595	2.8653	3.8111	2.8680

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	O3	H9	136.487	C1	O5	H10	107.873
C2	O4	H10	136.487	C2	O6	H9	107.873
O3	C1	O5	127.417	O3	C1	H7	123.318
O3	H9	O6	168.223	O4	C2	O6	127.417
O4	C2	H8	123.318	O4	H10	O5	168.223
O5	C1	H7	109.265	O6	C2	H8	109.265

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

using model chemistry: MP2=FULL/STO-3G

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/STO-3G

States and conformations

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