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 NCO (isocyanato radical)

using model chemistry: B2PLYP=FULL/Def2TZVPP

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 B2PLYP=FULL/Def2TZVPP
 hartrees
Energy at 0K-167.972763
Energy at 298.15K-167.972699
HF Energy-167.780764
Nuclear repulsion energy52.069073
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 B2PLYP=FULL/Def2TZVPP
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 2034 2034 110.78      
2 Σ 1279 1279 8.87      
3 Π 595 595 13.68      
3 Π 519 519 39.77      

Unscaled Zero Point Vibrational Energy (zpe) 2213.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 2213.8 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 B2PLYP=FULL/Def2TZVPP
B
0.39110

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/Def2TZVPP

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.266
C2 0.000 0.000 -0.038
O3 0.000 0.000 1.136

Atom - Atom Distances (Å)
  N1 C2 O3
N11.22742.4020
C21.22741.1747
O32.40201.1747

picture of isocyanato radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 O3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability