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

using model chemistry: B1B95/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/3-21G*
 hartrees
Energy at 0K-167.682207
Energy at 298.15K-167.683022
Nuclear repulsion energy58.896710
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 B1B95/3-21G*
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' 3798 3627 292.41      
2 A' 2420 2311 428.25      
3 A' 1335 1275 8.83      
4 A' 599 572 11.12      
5 A' 432 412 312.27      
6 A" 602 575 1.37      

Unscaled Zero Point Vibrational Energy (zpe) 4593.1 cm-1
Scaled (by 0.9549) Zero Point Vibrational Energy (zpe) 4386.0 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 B1B95/3-21G*
ABC
63.38967 0.36047 0.35843

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.292 -1.601 0.000
N2 0.451 -1.062 0.000
C3 0.000 0.043 0.000
O4 -0.556 1.097 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H10.99812.09053.2699
N20.99811.19372.3825
C32.09051.19371.1917
O43.26992.38251.1917

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 144.886 N2 C3 O4 174.385
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.366      
2 N -0.705      
3 C 0.807      
4 O -0.467      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.263 -1.726 0.000 2.846
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -13.645 -1.625 0.000
y -1.625 -17.109 0.000
z 0.000 0.000 -16.070
Traceless
 xyz
x 2.945 -1.625 0.000
y -1.625 -2.251 0.000
z 0.000 0.000 -0.693
Polar
3z2-r2-1.387
x2-y23.464
xy-1.625
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.547 -1.227 0.000
y -1.227 3.477 0.000
z 0.000 0.000 0.848


<r2> (average value of r2) Å2
<r2> 35.413
(<r2>)1/2 5.951