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

using model chemistry: HF/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-167.839430
Energy at 298.15K-167.840560
HF Energy-167.839430
Nuclear repulsion energy60.385686
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/Def2TZVPP
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' 3882 3519 200.82      
2 A' 2449 2220 1148.02      
3 A' 1446 1311 0.06      
4 A' 888 804 229.95      
5 A' 603 547 152.00      
6 A" 728 660 21.22      

Unscaled Zero Point Vibrational Energy (zpe) 4997.9 cm-1
Scaled (by 0.9064) Zero Point Vibrational Energy (zpe) 4530.1 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/Def2TZVPP
ABC
28.77159 0.38398 0.37893

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.806 -1.711 0.000
N2 -0.009 -1.147 0.000
C3 0.000 0.047 0.000
O4 -0.093 1.182 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H10.99141.93393.0298
N20.99141.19382.3307
C31.93391.19381.1392
O43.02982.33071.1392

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 124.250 N2 C3 O4 174.890
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.228      
2 N -0.476      
3 C 0.574      
4 O -0.326      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.708 -1.288 0.000 2.139
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.768 -2.526 0.000
y -2.526 -18.377 0.000
z 0.000 0.000 -16.637
Traceless
 xyz
x 2.740 -2.526 0.000
y -2.526 -2.675 0.000
z 0.000 0.000 -0.065
Polar
3z2-r2-0.130
x2-y23.610
xy-2.526
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.988 -0.297 0.000
y -0.297 4.413 0.000
z 0.000 0.000 1.856


<r2> (average value of r2) Å2
<r2> 34.419
(<r2>)1/2 5.867