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

using model chemistry: HF/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-167.831460
Energy at 298.15K-167.832593
Nuclear repulsion energy60.357541
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/cc-pVTZ
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' 3878 3529 194.41      
2 A' 2456 2236 1118.53      
3 A' 1444 1315 0.04      
4 A' 891 811 232.39      
5 A' 602 548 148.42      
6 A" 725 660 21.65      

Unscaled Zero Point Vibrational Energy (zpe) 4998.0 cm-1
Scaled (by 0.9101) Zero Point Vibrational Energy (zpe) 4548.7 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/cc-pVTZ
ABC
28.49718 0.38372 0.37862

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.895 -1.660 0.000
N2 0.044 -1.148 0.000
C3 0.000 0.048 0.000
O4 -0.151 1.177 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H10.99251.92803.0232
N20.99251.19672.3329
C31.92801.19671.1388
O43.02322.33291.1388

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 123.177 N2 C3 O4 174.523
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.230 0.373 0.515 0.375
2 N -0.351 -0.733 -1.598 -0.712
3 C 0.391 0.798 2.459 0.751
4 O -0.270 -0.439 -1.378 -0.415


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.701 -1.285 0.000 2.132
CHELPG        
AIM -0.437 0.475 0.000 0.646
ESP 1.754 -1.249 0.000 2.154


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.682 -2.493 0.000
y -2.493 -18.299 0.000
z 0.000 0.000 -16.549
Traceless
 xyz
x 2.742 -2.493 0.000
y -2.493 -2.683 0.000
z 0.000 0.000 -0.059
Polar
3z2-r2-0.117
x2-y23.616
xy-2.493
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.940 -0.309 0.000
y -0.309 4.258 0.000
z 0.000 0.000 1.770


<r2> (average value of r2) Å2
<r2> 34.380
(<r2>)1/2 5.863