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

using model chemistry: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-168.610908
Energy at 298.15K-168.611919
Nuclear repulsion energy58.992731
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 B3PW91/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3710 3550 140.02      
2 A' 2379 2276 606.39      
3 A' 1349 1290 0.40      
4 A' 792 758 233.39      
5 A' 566 541 76.09      
6 A" 618 591 3.14      

Unscaled Zero Point Vibrational Energy (zpe) 4706.9 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 4503.1 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 B3PW91/6-31G*
ABC
29.12192 0.36625 0.36170

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.464 -1.278 0.000
N2 0.478 -1.069 0.000
C3 0.000 0.051 0.000
O4 -0.601 1.057 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H11.00741.97673.1172
N21.00741.21722.3843
C31.97671.21721.1725
O43.11722.38431.1725

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 125.120 N2 C3 O4 172.277
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.383     0.387
2 N -0.652     -0.652
3 C 0.662     0.605
4 O -0.392     -0.341


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.147 -0.676 0.000 2.251
CHELPG        
AIM        
ESP 2.210 -0.615 0.000 2.294


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -13.080 -1.006 0.000
y -1.006 -18.534 0.000
z 0.000 0.000 -16.294
Traceless
 xyz
x 4.334 -1.006 0.000
y -1.006 -3.847 0.000
z 0.000 0.000 -0.487
Polar
3z2-r2-0.975
x2-y25.454
xy-1.006
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 35.195
(<r2>)1/2 5.933