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All results from a given calculation for HNCO (Isocyanic acid)

using model chemistry: B3LYP/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/CEP-31G
 hartrees
Energy at 0K-32.058812
Energy at 298.15K-32.059469
Nuclear repulsion energy30.210652
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 B3LYP/CEP-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 A' 3835 3714 314.18      
2 A' 2286 2214 598.51      
3 A' 1266 1226 15.31      
4 A' 559 541 5.98      
5 A' 329 319 351.87      
6 A" 568 550 0.14      

Unscaled Zero Point Vibrational Energy (zpe) 4422.0 cm-1
Scaled (by 0.9684) Zero Point Vibrational Energy (zpe) 4282.2 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 B3LYP/CEP-31G
ABC
69.79150 0.34546 0.34376

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.156 -1.737 0.000
N2 0.376 -1.100 0.000
C3 0.000 0.059 0.000
O4 -0.506 1.167 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H11.00692.13643.3457
N21.00691.21902.4322
C32.13641.21901.2172
O43.34572.43221.2172

picture of Isocyanic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 N2 C3 147.236 N2 C3 O4 173.407
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.364      
2 N -0.023      
3 C -0.282      
4 O -0.060      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.322 -2.287 0.000 3.259
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.589 -1.837 0.000
y -1.837 -17.540 0.000
z 0.000 0.000 -16.685
Traceless
 xyz
x 2.523 -1.837 0.000
y -1.837 -1.903 0.000
z 0.000 0.000 -0.620
Polar
3z2-r2-1.240
x2-y22.951
xy-1.837
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.778 -1.185 -0.000
y -1.185 4.483 0.001
z -0.000 0.001 1.295


<r2> (average value of r2) Å2
<r2> 30.990
(<r2>)1/2 5.567