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

using model chemistry: B3LYP/STO-3G

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/STO-3G
 hartrees
Energy at 0K-166.390067
Energy at 298.15K-166.390886
Nuclear repulsion energy56.586178
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/STO-3G
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' 3593 3206 27.51      
2 A' 2315 2066 124.03      
3 A' 1248 1113 1.61      
4 A' 944 843 177.49      
5 A' 489 436 25.19      
6 A" 517 462 0.84      

Unscaled Zero Point Vibrational Energy (zpe) 4552.5 cm-1
Scaled (by 0.8924) Zero Point Vibrational Energy (zpe) 4062.6 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 B3LYP/STO-3G
ABC
19.24857 0.34129 0.33534

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.942 -0.240 0.000
N2 0.995 -0.714 0.000
C3 0.000 0.085 0.000
O4 -1.113 0.591 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H11.05971.96953.1667
N21.05971.27602.4794
C31.96951.27601.2228
O43.16672.47941.2228

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 114.645 N2 C3 O4 165.668
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.209      
2 N -0.321      
3 C 0.249      
4 O -0.137      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.324 0.955 0.000 1.633
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -13.314 2.089 0.000
y 2.089 -16.565 0.000
z 0.000 0.000 -14.934
Traceless
 xyz
x 2.436 2.089 0.000
y 2.089 -2.441 0.000
z 0.000 0.000 0.006
Polar
3z2-r20.011
x2-y23.251
xy2.089
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.874 -0.981 0.000
y -0.981 1.208 0.000
z 0.000 0.000 0.416


<r2> (average value of r2) Å2
<r2> 36.410
(<r2>)1/2 6.034