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: QCISD(TQ)/SDD

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 QCISD(TQ)/SDD
 hartrees
Energy at 0K-187.896369
Energy at 298.15K-187.896357
HF Energy-187.547410
Nuclear repulsion energy56.234255
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 QCISD(TQ)/SDD
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 1234 1234        
2 Σu 2190 2190        
3 Πu 603 603        
3 Πu 603 603        

Unscaled Zero Point Vibrational Energy (zpe) 2314.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 2314.5 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 QCISD(TQ)/SDD
B
0.36306

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(TQ)/SDD

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 1.205
O3 0.000 0.000 -1.205

Atom - Atom Distances (Å)
  C1 O2 O3
C11.20481.2048
O21.20482.4095
O31.20482.4095

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