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	hartrees
Energy at 0K	-264.430733
Energy at 298.15K	-264.434480
HF Energy	-263.697368
Nuclear repulsion energy	122.562272

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁	3823	3703	10.98
2	A₁	1830	1773	537.72
3	A₁	1321	1279	20.65
4	A₁	973	943	17.65
5	A₁	546	529	5.85
6	A₂	532	516	0.00
7	B₁	800	775	52.29
8	B₁	599	580	204.93
9	B₂	3820	3700	174.87
10	B₂	1478	1432	110.94
11	B₂	1191	1154	443.09
12	B₂	601	582	45.96

Atom	y (Å)	z (Å)
C1	0.000	0.103
O2	0.000	1.317
O3	1.092	-0.686
O4	-1.092	-0.686
H5	1.854	-0.088
H6	-1.854	-0.088

	C1	O2	O3	O4	H5	H6
C1		1.2137	1.3477	1.3477	1.8635	1.8635
O2	1.2137		2.2815	2.2815	2.3256	2.3256
O3	1.3477	2.2815		2.1849	0.9684	3.0063
O4	1.3477	2.2815	2.1849		3.0063	0.9684
H5	1.8635	2.3256	0.9684	3.0063		3.7073
H6	1.8635	2.3256	3.0063	0.9684	3.7073

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	O3	H5	105.976	C1	O4	H6	105.976
O2	C1	O3	125.847	O2	C1	O4	125.847
O3	C1	O4	108.307

All results from a given calculation for H₂CO₃ (Carbonic acid)

using model chemistry: QCISD/aug-cc-pVDZ

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 H2CO3 (Carbonic acid)

using model chemistry: QCISD/aug-cc-pVDZ

States and conformations

All results from a given calculation for H₂CO₃ (Carbonic acid)