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: QCISD(T)=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 QCISD(T)=FULL/Def2TZVPP
 hartrees
Energy at 0K-167.815772
Energy at 298.15K-167.815687
HF Energy-167.196712
Nuclear repulsion energy51.862849
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(T)=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 1975 1975        
2 Σ 1264 1264        
3 Π 581 581        
3 Π 505 505        

Unscaled Zero Point Vibrational Energy (zpe) 2162.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 2162.7 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(T)=FULL/Def2TZVPP
B
0.38814

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/Def2TZVPP

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.270
C2 0.000 0.000 -0.039
O3 0.000 0.000 1.141

Atom - Atom Distances (Å)
  N1 C2 O3
N11.23112.4111
C21.23111.1800
O32.41111.1800

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