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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-32.123647
Energy at 298.15K-32.124640
Nuclear repulsion energy30.491442
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' 3641 3516 110.45      
2 A' 2308 2229 708.93      
3 A' 1312 1267 0.08      
4 A' 822 794 213.78      
5 A' 542 524 74.08      
6 A" 601 581 0.94      

Unscaled Zero Point Vibrational Energy (zpe) 4613.4 cm-1
Scaled (by 0.9657) Zero Point Vibrational Energy (zpe) 4455.2 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
25.35352 0.35720 0.35224

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 1.555 -1.151 0.000
N2 0.540 -1.063 0.000
C3 0.000 0.053 0.000
O4 -0.666 1.035 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H11.01891.96643.1162
N21.01891.23992.4200
C31.96641.23991.1865
O43.11622.42001.1865

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 120.725 N2 C3 O4 171.623
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 0.333      
2 N -0.090      
3 C -0.218      
4 O -0.026      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.193 -0.449 0.000 2.238
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -13.128 -0.576 0.000
y -0.576 -19.252 0.000
z 0.000 0.000 -16.622
Traceless
 xyz
x 4.809 -0.576 0.000
y -0.576 -4.377 0.000
z 0.000 0.000 -0.432
Polar
3z2-r2-0.863
x2-y26.124
xy-0.576
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.623 -1.319 0.000
y -1.319 3.904 0.000
z 0.000 0.000 1.598


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