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

using model chemistry: HF/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 HF/6-31G*
 hartrees
Energy at 0K-167.761384
Energy at 298.15K-167.762477
HF Energy-167.761384
Nuclear repulsion energy60.030735
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/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' 3919 3521 201.94      
2 A' 2483 2231 1046.83      
3 A' 1459 1311 0.15      
4 A' 854 768 270.65      
5 A' 591 531 167.85      
6 A" 699 628 24.11      

Unscaled Zero Point Vibrational Energy (zpe) 5002.5 cm-1
Scaled (by 0.8985) Zero Point Vibrational Energy (zpe) 4494.8 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/6-31G*
ABC
30.03567 0.37902 0.37430

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.188 -1.478 0.000
N2 0.261 -1.122 0.000
C3 0.000 0.047 0.000
O4 -0.377 1.131 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H10.99351.93373.0430
N20.99351.19782.3417
C31.93371.19781.1478
O43.04302.34171.1478

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 123.613 N2 C3 O4 173.415
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.419      
2 N -0.756      
3 C 0.799      
4 O -0.462      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.988 -1.257 0.000 2.352
CHELPG 2.038 -1.240 0.000 2.386
AIM -0.588 0.273 0.000 0.649
ESP 2.052 -1.230 0.000 2.393


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.182 -2.380 0.005
y -2.380 -18.662 -0.008
z 0.005 -0.008 -16.444
Traceless
 xyz
x 3.371 -2.380 0.005
y -2.380 -3.349 -0.008
z 0.005 -0.008 -0.022
Polar
3z2-r2-0.044
x2-y24.480
xy-2.380
xz0.005
yz-0.008


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.563 -0.541 0.000
y -0.541 4.016 -0.003
z 0.000 -0.003 1.255


<r2> (average value of r2) Å2
<r2> 34.632
(<r2>)1/2 5.885