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

using model chemistry: B1B95/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B1B95/6-31G**
 hartrees
Energy at 0K-168.628619
Energy at 298.15K-168.629626
Nuclear repulsion energy59.105731
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 B1B95/6-31G**
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' 3740 3571 152.97      
2 A' 2390 2282 619.18      
3 A' 1356 1295 0.35      
4 A' 778 742 212.25      
5 A' 559 534 85.73      
6 A" 618 590 3.63      

Unscaled Zero Point Vibrational Energy (zpe) 4720.4 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 4507.1 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 B1B95/6-31G**
ABC
29.19221 0.36765 0.36307

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.436 -1.302 0.000
N2 0.456 -1.076 0.000
C3 0.000 0.050 0.000
O4 -0.579 1.067 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H11.00511.97153.1093
N21.00511.21472.3800
C31.97151.21471.1705
O43.10932.38001.1705

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 125.017 N2 C3 O4 172.432
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.314      
2 N -0.580      
3 C 0.654      
4 O -0.388      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.097 -0.734 0.000 2.222
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -13.149 -1.061 0.000
y -1.061 -18.427 0.000
z 0.000 0.000 -16.239
Traceless
 xyz
x 4.184 -1.061 0.000
y -1.061 -3.733 0.000
z 0.000 0.000 -0.451
Polar
3z2-r2-0.902
x2-y25.278
xy-1.061
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.204 -1.215 0.000
y -1.215 3.781 0.000
z 0.000 0.000 1.301


<r2> (average value of r2) Å2
<r2> 35.077
(<r2>)1/2 5.923