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 CO (Carbon monoxide)

using model chemistry: CCSD=FULL/cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 1Σ
Energy calculated at CCSD=FULL/cc-pVQZ
 hartrees
Energy at 0K-113.227116
Energy at 298.15K-113.225864
HF Energy-112.789594
Nuclear repulsion energy22.641284
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 CCSD=FULL/cc-pVQZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σ 2248 2248 75.36      

Unscaled Zero Point Vibrational Energy (zpe) 1123.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 1123.9 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 CCSD=FULL/cc-pVQZ
B
1.95357

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/cc-pVQZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -0.641
O2 0.000 0.000 0.481

Atom - Atom Distances (Å)
  C1 O2
C11.1219
O21.1219

picture of Carbon monoxide state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability