return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for COH (Hydroxymethylidyne)

using model chemistry: CCSD(T)/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at CCSD(T)/6-31G*
 hartrees
Energy at 0K-113.482628
Energy at 298.15K-113.482473
HF Energy-113.190580
Nuclear repulsion energy25.557644
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(T)/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3315 3189        
2 A' 1387 1335        
3 A' 1166 1122        

Unscaled Zero Point Vibrational Energy (zpe) 2934.0 cm-1
Scaled (by 0.9621) Zero Point Vibrational Energy (zpe) 2822.8 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(T)/6-31G*
ABC
22.48913 1.35934 1.28186

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.061 0.802 0.000
O2 0.061 -0.491 0.000
H3 -0.852 -0.883 0.000

Atom - Atom Distances (Å)
  C1 O2 H3
C11.29341.9160
O21.29340.9930
H31.91600.9930

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