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

using model chemistry: B1B95/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/6-311G**
 hartrees
Energy at 0K-168.676508
Energy at 298.15K-168.677536
Nuclear repulsion energy59.452701
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 B1B95/6-311G**
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' 3721 3573 160.50      
2 A' 2389 2294 686.87      
3 A' 1355 1301 0.45      
4 A' 774 743 192.68      
5 A' 565 542 102.85      
6 A" 639 614 4.69      

Unscaled Zero Point Vibrational Energy (zpe) 4721.4 cm-1
Scaled (by 0.9601) Zero Point Vibrational Energy (zpe) 4533.1 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 B1B95/6-311G**
ABC
29.61917 0.37196 0.36735

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.319 -1.412 0.000
N2 0.364 -1.104 0.000
C3 0.000 0.049 0.000
O4 -0.483 1.105 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H11.00391.96813.0958
N21.00391.20852.3657
C31.96811.20851.1617
O43.09582.36571.1617

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 125.393 N2 C3 O4 172.940
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.255      
2 N -0.459      
3 C 0.471      
4 O -0.267      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.006 -0.911 0.000 2.203
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -13.513 -1.420 0.000
y -1.420 -18.449 0.000
z 0.000 0.000 -16.343
Traceless
 xyz
x 3.883 -1.420 0.000
y -1.420 -3.521 0.000
z 0.000 0.000 -0.363
Polar
3z2-r2-0.725
x2-y24.936
xy-1.420
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.071 -1.045 0.000
y -1.045 4.034 0.000
z 0.000 0.000 1.441


<r2> (average value of r2) Å2
<r2> 34.898
(<r2>)1/2 5.907