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 NCO (isocyanato radical)

using model chemistry: B2PLYP/6-31G*

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/6-31G*
 hartrees
Energy at 0K-167.854275
Energy at 298.15K-167.854154
HF Energy-167.708929
Nuclear repulsion energy51.626064
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/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 Σ 2046 1942 90.64      
2 Σ 1283 1218 8.54      
3 Π 553 525 14.02      
4 Π 490 465 39.32      

Unscaled Zero Point Vibrational Energy (zpe) 2185.6 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 2074.6 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/6-31G*
B
0.38454

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G*

Point Group is C∞v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 -1.276
C2 0.000 0.000 -0.040
O3 0.000 0.000 1.146

Atom - Atom Distances (Å)
  N1 C2 O3
N11.23612.4224
C21.23611.1863
O32.42241.1863

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 B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.353      
2 C 0.686      
3 O -0.334      


Electric dipole moments


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.302 0.000 0.000
y 0.000 1.427 0.000
z 0.000 0.000 4.145


<r2> (average value of r2) Å2
<r2> 32.423
(<r2>)1/2 5.694