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 OH (Hydroxyl radical)

using model chemistry: CCSD(T)/LANL2DZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C*V 2Π
Energy calculated at CCSD(T)/LANL2DZ
 hartrees
Energy at 0K-75.480995
Energy at 298.15K-75.480742
HF Energy-75.385283
Nuclear repulsion energy4.214876
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)/LANL2DZ
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 3421 3226        

Unscaled Zero Point Vibrational Energy (zpe) 1710.4 cm-1
Scaled (by 0.9431) Zero Point Vibrational Energy (zpe) 1613.0 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)/LANL2DZ
B
17.63969

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/LANL2DZ

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.112
H2 0.000 0.000 -0.892

Atom - Atom Distances (Å)
  O1 H2
O11.0040
H21.0040

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