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

using model chemistry: B1B95/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 B1B95/cc-pVTZ
 hartrees
Energy at 0K-168.689579
Energy at 298.15K-168.690626
Nuclear repulsion energy59.559601
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 B1B95/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' 3718 3558 159.74      
2 A' 2379 2277 721.77      
3 A' 1357 1299 0.20      
4 A' 798 764 196.17      
5 A' 573 548 93.89      
6 A" 646 618 4.64      

Unscaled Zero Point Vibrational Energy (zpe) 4735.2 cm-1
Scaled (by 0.9571) Zero Point Vibrational Energy (zpe) 4532.0 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 B1B95/cc-pVTZ
ABC
29.19368 0.37344 0.36873

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.302 -1.415 0.000
N2 0.349 -1.107 0.000
C3 0.000 0.048 0.000
O4 -0.468 1.109 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H11.00201.95933.0834
N21.00201.20702.3619
C31.95931.20701.1594
O43.08342.36191.1594

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 124.728 N2 C3 O4 172.990
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.214      
2 N -0.279      
3 C 0.275      
4 O -0.210      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.892 -0.940 0.000 2.112
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -13.700 -1.416 0.000
y -1.416 -18.355 0.000
z 0.000 0.000 -16.454
Traceless
 xyz
x 3.705 -1.416 0.000
y -1.416 -3.278 0.000
z 0.000 0.000 -0.426
Polar
3z2-r2-0.852
x2-y24.655
xy-1.416
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.394 -0.949 0.000
y -0.949 4.261 0.000
z 0.000 0.000 1.837


<r2> (average value of r2) Å2
<r2> 34.837
(<r2>)1/2 5.902