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

using model chemistry: BLYP/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 BLYP/cc-pVTZ
 hartrees
Energy at 0K-168.726735
Energy at 298.15K-168.727743
Nuclear repulsion energy58.753402
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 BLYP/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' 3573 3562 116.82      
2 A' 2259 2252 559.14      
3 A' 1279 1276 0.54      
4 A' 797 794 204.19      
5 A' 558 557 54.04      
6 A" 603 601 1.03      

Unscaled Zero Point Vibrational Energy (zpe) 4534.6 cm-1
Scaled (by 0.997) Zero Point Vibrational Energy (zpe) 4521.0 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 BLYP/cc-pVTZ
ABC
28.50856 0.36347 0.35889

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.514 -1.227 0.000
N2 0.516 -1.056 0.000
C3 0.000 0.051 0.000
O4 -0.641 1.039 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H11.01221.98123.1272
N21.01221.22162.3937
C31.98121.22161.1779
O43.12722.39371.1779

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 124.712 N2 C3 O4 172.032
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.190      
2 N -0.231      
3 C 0.225      
4 O -0.184      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.981 -0.682 0.000 2.096
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -13.664 -0.710 0.000
y -0.710 -18.759 0.000
z 0.000 0.000 -16.687
Traceless
 xyz
x 4.059 -0.710 0.000
y -0.710 -3.584 0.000
z 0.000 0.000 -0.475
Polar
3z2-r2-0.951
x2-y25.095
xy-0.710
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 35.638
(<r2>)1/2 5.970