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

using model chemistry: PBEPBE/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 PBEPBE/6-31G**
 hartrees
Energy at 0K-168.502898
Energy at 298.15K-168.503876
Nuclear repulsion energy58.437073
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/6-31G**
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' 3625 3575 113.81      
2 A' 2310 2279 477.91      
3 A' 1297 1279 0.32      
4 A' 784 773 204.07      
5 A' 545 537 54.17      
6 A" 587 579 0.46      

Unscaled Zero Point Vibrational Energy (zpe) 4574.0 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 4511.3 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/6-31G**
ABC
27.52936 0.35982 0.35517

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.629 -1.074 0.000
N2 0.616 -1.009 0.000
C3 0.000 0.053 0.000
O4 -0.743 0.977 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H11.01491.98113.1357
N21.01491.22842.4068
C31.98111.22841.1853
O43.13572.40681.1853

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 123.764 N2 C3 O4 171.302
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.300      
2 N -0.544      
3 C 0.600      
4 O -0.357      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.108 -0.381 0.000 2.142
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -13.000 -0.336 0.000
y -0.336 -18.487 0.000
z 0.000 0.000 -16.332
Traceless
 xyz
x 4.410 -0.336 0.000
y -0.336 -3.821 0.000
z 0.000 0.000 -0.589
Polar
3z2-r2-1.178
x2-y25.488
xy-0.336
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.706 -1.436 0.000
y -1.436 3.490 0.000
z 0.000 0.000 1.331


<r2> (average value of r2) Å2
<r2> 35.621
(<r2>)1/2 5.968