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

using model chemistry: HF/TZVP

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/TZVP
 hartrees
Energy at 0K-167.823399
Energy at 298.15K-167.824487
HF Energy-167.823399
Nuclear repulsion energy60.423818
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/TZVP
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' 3911 3554 242.49      
2 A' 2473 2247 1212.18      
3 A' 1464 1331 0.24      
4 A' 814 740 200.15      
5 A' 567 516 240.52      
6 A" 723 657 27.12      

Unscaled Zero Point Vibrational Energy (zpe) 4977.0 cm-1
Scaled (by 0.9086) Zero Point Vibrational Energy (zpe) 4522.1 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/TZVP
ABC
32.10260 0.38357 0.37904

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 0.894 -1.694 0.000
N2 0.072 -1.141 0.000
C3 0.000 0.048 0.000
O4 -0.174 1.174 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H10.99121.95843.0609
N20.99121.19112.3280
C31.95841.19111.1394
O43.06092.32801.1394

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 127.397 N2 C3 O4 174.642
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.270      
2 N -0.471      
3 C 0.583      
4 O -0.382      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.895 -1.471 0.000 2.399
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.765 -2.631 0.000
y -2.631 -18.659 0.000
z 0.000 0.000 -16.637
Traceless
 xyz
x 2.882 -2.631 0.000
y -2.631 -2.958 0.000
z 0.000 0.000 0.075
Polar
3z2-r20.151
x2-y23.893
xy-2.631
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.671 -0.369 0.000
y -0.369 4.485 0.000
z 0.000 0.000 1.543


<r2> (average value of r2) Å2
<r2> 34.524
(<r2>)1/2 5.876