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

using model chemistry: HF/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 HF/STO-3G
 hartrees
Energy at 0K-165.502919
Energy at 298.15K-165.503852
Nuclear repulsion energy58.187580
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 HF/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' 3960 3233 62.79      
2 A' 2510 2049 390.94      
3 A' 1394 1138 1.00      
4 A' 1043 852 253.34      
5 A' 535 437 51.61      
6 A" 580 473 7.35      

Unscaled Zero Point Vibrational Energy (zpe) 5010.5 cm-1
Scaled (by 0.8165) Zero Point Vibrational Energy (zpe) 4091.1 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 HF/STO-3G
ABC
21.34088 0.35956 0.35361

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.728 -0.785 0.000
N2 0.708 -0.964 0.000
C3 0.000 0.060 0.000
O4 -0.836 0.897 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H11.03541.92323.0658
N21.03541.24522.4182
C31.92321.24521.1828
O43.06582.41821.1828

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 114.667 N2 C3 O4 169.711
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.203      
2 N -0.378      
3 C 0.384      
4 O -0.208      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.602 0.684 0.000 1.742
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -12.922 1.551 0.000
y 1.551 -18.486 0.000
z 0.000 0.000 -14.806
Traceless
 xyz
x 3.724 1.551 0.000
y 1.551 -4.622 0.000
z 0.000 0.000 0.898
Polar
3z2-r21.797
x2-y25.564
xy1.551
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.046 -1.260 0.000
y -1.260 1.847 0.000
z 0.000 0.000 0.376


<r2> (average value of r2) Å2
<r2> 35.287
(<r2>)1/2 5.940