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

using model chemistry: PBEPBE/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 PBEPBE/6-311G*
 hartrees
Energy at 0K-168.547987
Energy at 298.15K-168.548993
Nuclear repulsion energy58.779685
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 PBEPBE/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' 3616 3578 104.98      
2 A' 2313 2289 539.94      
3 A' 1298 1284 0.58      
4 A' 787 779 220.32      
5 A' 562 556 61.95      
6 A" 610 604 0.83      

Unscaled Zero Point Vibrational Energy (zpe) 4592.4 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 4544.6 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 PBEPBE/6-311G*
ABC
29.24638 0.36360 0.35914

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.519 -1.233 0.000
N2 0.523 -1.051 0.000
C3 0.000 0.052 0.000
O4 -0.647 1.035 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H11.01271.98963.1362
N21.01271.22092.3919
C31.98961.22091.1769
O43.13622.39191.1769

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 125.681 N2 C3 O4 171.982
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.353      
2 N -0.564      
3 C 0.443      
4 O -0.232      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.145 -0.618 0.000 2.233
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -13.215 -0.892 0.000
y -0.892 -18.642 0.000
z 0.000 0.000 -16.536
Traceless
 xyz
x 4.374 -0.892 0.000
y -0.892 -3.766 0.000
z 0.000 0.000 -0.607
Polar
3z2-r2-1.215
x2-y25.427
xy-0.892
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.466 -1.330 0.000
y -1.330 3.821 0.000
z 0.000 0.000 1.460


<r2> (average value of r2) Å2
<r2> 35.489
(<r2>)1/2 5.957