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=FULL/6-31+G**

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=FULL/6-31+G**
 hartrees
Energy at 0K-188.129361
Energy at 298.15K-188.129411
HF Energy-187.632792
Nuclear repulsion energy57.417626
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=FULL/6-31+G**
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 1323 1242 0.00 32.92 0.19 0.32
2 Σu 2420 2272 568.90 0.00 0.00 0.00
3 Πu 650 610 25.65 0.00 0.00 0.00
3 Πu 650 610 25.65 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 2520.9 cm-1
Scaled (by 0.9392) Zero Point Vibrational Energy (zpe) 2367.6 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=FULL/6-31+G**
B
0.37866

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31+G**

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 1.180
O3 0.000 0.000 -1.180

Atom - Atom Distances (Å)
  C1 O2 O3
C11.17971.1797
O21.17972.3594
O31.17972.3594

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

Electronic state

Charges, Dipole, Quadrupole and Polarizability