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	hartrees
Energy at 0K	-264.334498
Energy at 298.15K	-264.338255
HF Energy	-263.656874
Nuclear repulsion energy	122.936289

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁	3896	3668	14.26
2	A₁	1895	1784	476.31
3	A₁	1332	1254	34.98
4	A₁	1001	943	14.09
5	A₁	551	518	5.61
6	A₂	540	508	0.00
7	B₁	797	750	83.92
8	B₁	616	580	227.72
9	B₂	3893	3665	155.30
10	B₂	1527	1438	146.78
11	B₂	1206	1136	433.06
12	B₂	605	569	56.87

Atom	y (Å)	z (Å)
C1	0.000	0.101
O2	0.000	1.313
O3	1.089	-0.684
O4	-1.089	-0.684
H5	1.846	-0.084
H6	-1.846	-0.084

	C1	O2	O3	O4	H5	H6
C1		1.2122	1.3425	1.3425	1.8551	1.8551
O2	1.2122		2.2746	2.2746	2.3147	2.3147
O3	1.3425	2.2746		2.1788	0.9657	2.9960
O4	1.3425	2.2746	2.1788		2.9960	0.9657
H5	1.8551	2.3147	0.9657	2.9960		3.6918
H6	1.8551	2.3147	2.9960	0.9657	3.6918

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	O3	H5	105.814	C1	O4	H6	105.814
O2	C1	O3	125.759	O2	C1	O4	125.759
O3	C1	O4	108.481

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

using model chemistry: QCISD/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 H2CO3 (Carbonic acid)

using model chemistry: QCISD/6-31G**

States and conformations

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