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: PBE1PBE/6-311G*

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 PBE1PBE/6-311G*
 hartrees
Energy at 0K-167.860369
Energy at 298.15K-167.860299
HF Energy-167.860369
Nuclear repulsion energy52.235043
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 PBE1PBE/6-311G*
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 2049 1964 73.03      
2 Σ 1319 1264 8.64      
3 Π 596 571 15.92      
3 Π 511 489 41.43      

Unscaled Zero Point Vibrational Energy (zpe) 2237.2 cm-1
Scaled (by 0.9585) Zero Point Vibrational Energy (zpe) 2144.4 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 PBE1PBE/6-311G*
B
0.39365

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/6-311G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.261
C2 0.000 0.000 -0.039
O3 0.000 0.000 1.133

Atom - Atom Distances (Å)
  N1 C2 O3
N11.22212.3942
C21.22211.1721
O32.39421.1721

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
Charges from optimized geometry at PBE1PBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.259      
2 C 0.446      
3 O -0.187      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 0.749 0.749
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.730 0.000 0.000
y 0.000 -14.418 0.000
z 0.000 0.000 -20.110
Traceless
 xyz
x 1.534 0.000 0.000
y 0.000 3.502 0.000
z 0.000 0.000 -5.036
Polar
3z2-r2-10.072
x2-y2-1.313
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.376 0.000 0.000
y 0.000 1.495 0.000
z 0.000 0.000 4.251


<r2> (average value of r2) Å2
<r2> 31.876
(<r2>)1/2 5.646