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	hartrees
Energy at 0K	-263.680028
Energy at 298.15K	-263.683962
HF Energy	-263.680028
Nuclear repulsion energy	125.419265

Mode Number	Symmetry	Frequency (cm^-1)	Scaled Frequency (cm^-1)	IR Intensities (km mol^-1)
1	A₁	4124	3745	44.67
2	A₁	2033	1846	702.20
3	A₁	1421	1290	35.04
4	A₁	1087	987	13.44
5	A₁	602	546	6.18
6	A₂	581	528	0.00
7	B₁	909	825	110.97
8	B₁	633	575	237.78
9	B₂	4122	3743	265.53
10	B₂	1623	1474	245.81
11	B₂	1314	1193	432.64
12	B₂	667	606	66.66

Atom	y (Å)	z (Å)
C1	0.000	0.094
O2	0.000	1.280
O3	1.074	-0.664
O4	-1.074	-0.664
H5	1.830	-0.089
H6	-1.830	-0.089

	C1	O2	O3	O4	H5	H6
C1		1.1855	1.3146	1.3146	1.8389	1.8389
O2	1.1855		2.2205	2.2205	2.2850	2.2850
O3	1.3146	2.2205		2.1483	0.9494	2.9602
O4	1.3146	2.2205	2.1483		2.9602	0.9494
H5	1.8389	2.2850	0.9494	2.9602		3.6595
H6	1.8389	2.2850	2.9602	0.9494	3.6595

atom1	atom2	atom3	angle	atom1	atom2	atom3	angle
C1	O3	H5	107.534	C1	O4	H6	107.534
O2	C1	O3	125.207	O2	C1	O4	125.207
O3	C1	O4	109.587

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

using model chemistry: HF/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
	Home All data for one species Geometry Experimental Experimental Geometries Same bond/angle many molecules Internal Coordinates by type Bond angles Calculated Calculated geometry Rotational constant Moments of inertia Products of moments of inertia BSE Bond lengths Show me a calculated geometry Comparisons Bonds, angles Rotational Constants Products of moments of inertia Point group Bad Calculations Bad moment of inertia Tutorials and Explanations Angle formulas Vibrations Experimental Vibrational frequencies Calculated Frequencies Scale factors Reactions Entropies Ions List Ions Energy Calculated Ionization Energy Compare Ionzation energy Electron Affinity Calculated Electron affinity Compare Electron affinity Proton Affinity Calculated Proton affinity Compare Proton affinity Ionization changes point group Experimental One molecule all properties One property a few molecules Enthalpy of formation Entropy Integrated Heat Capacity Heat Capacity Rotational Constants Vibrational Frequencies Dipole moment Ionization Energy Polarizability Quadrupole Point Groups Geometry Experimental Geometries Internal Coordinates by type Bond angles Rotational Constants Point Groups Diatomic bond lengths Vibrations Vibrational frequencies Diatomic Triatomics Energy Atomization Energy Internal Rotation Electrostatics Dipole Quadrupole Polarizability Reference Data Reference states Spin Splittings Molecules with good enthalpy Enthalpy at 0 Kelvin Calculated Energy Optimized Energy Energy 298K Minimum conformation Hydrogen bonds H bond with counterpoise Reaction Reaction Energy 0K Reaction Energy 298K Internal Rotation Barriers to internal rotation Rotational barrier and dipole Rotational Barrier 2 molecules Orbital HOMO LUMO gap HOMO Orbital Energies Nuclear repulsion energy Correlation Full vs Frozen core energies Partial correlation energies Ion Calculated Ionization Energy Vertical ionization Energy Calculated Electron affinity Calculated Proton affinity Atom charge differences Excited State Singlet triplet gap Electronic state Transition state Basis Set Extrapolation BSE energy BSE Bond lengths Geometry Calculated geometry AIM bond orders One type of bond Rotation Rotational constant Products of moments of inertia Moments of inertia Inertial defects Second moments Point group State symmetry <r2> Sorted by r2 Z-matrix Bad Calculations Bad moment of inertia Bad Calculated Bond Lengths Bad point group Worst molecules Vibrations Frequencies Animated vibrations Anharmonic Zero point energy (ZPE) Scale Factors Scale factors Scale factor uncertainty Calculate a scale factor Why scale vibrations Set scaling factors Bad Calculations Bad Vib. 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Calc. vs exp. Bad Vib. HF vs MP2 Bad scale factors Low excited states Oddities NaCN Is not linear FAQ Help Units Choose Units Energy Bond length Rotational Constant Moment of Inertia Dipole and Quadrupole Polarizability Explanations Hartree cm-1 Debye Credits Just show me Show me a calculated geometry Summary Using older interface Limit Basis sets Method options List Recent molecules Choose a few Molecules Number of atoms By heavy atoms Diatomics InChI Deuterated Dimers Geometry Point group Point group count Bonds types Isodesmic reactions Bad point group Multiple conformers, states Vibrations Big anharmonicity Energy Enthalpy at 0 Kelvin Similar molecules Similar Isomers Cis/trans Tautomers Multiple conformers, states Ions, Dipoles, etc. List Ions Ionization changes point group Dipole Quadrupole Polarizability Proton Affinities Index of CCCBDB Feedback Error form Wants
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Number	Element	Mulliken
1	C	0.526
2	O	-0.402
3	O	-0.248
4	O	-0.248
5	H	0.186
6	H	0.186

	x	y	z	Total
	0.000	0.000	-0.269	0.269
CHELPG
AIM
ESP

<r²>	58.699
(<r²>)^1/2	7.662

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

using model chemistry: HF/cc-pVDZ

States and conformations

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