return to home page 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 CO2 (Carbon dioxide)

using model chemistry: MP2/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D*H 1Σg
Energy calculated at MP2/STO-3G
 hartrees
Energy at 0K-185.283995
Energy at 298.15K-185.283727
HF Energy-185.060930
Nuclear repulsion energy55.032439
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at MP2/STO-3G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σg 1276 1113 0.00 15.21 0.26 0.41
2 Σu 2598 2265 35.78 0.00 0.00 0.00
3 Πu 478 417 3.69 0.00 0.00 0.00
3 Πu 478 417 3.69 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 2415.1 cm-1
Scaled (by 0.8719) Zero Point Vibrational Energy (zpe) 2105.7 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at MP2/STO-3G
B
0.34786

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/STO-3G

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.000
O2 0.000 0.000 1.231
O3 0.000 0.000 -1.231

Atom - Atom Distances (Å)
  C1 O2 O3
C11.23081.2308
O21.23082.4616
O31.23082.4616

picture of Carbon dioxide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O2 C1 O3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability