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

using model chemistry: mPW1PW91/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/6-31G(2df,p)
 hartrees
Energy at 0K-168.649749
Energy at 298.15K-168.650803
Nuclear repulsion energy59.365206
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 mPW1PW91/6-31G(2df,p)
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' 3743 3573 156.20      
2 A' 2391 2283 631.04      
3 A' 1360 1299 0.29      
4 A' 806 770 193.58      
5 A' 578 551 97.53      
6 A" 657 627 5.38      

Unscaled Zero Point Vibrational Energy (zpe) 4767.3 cm-1
Scaled (by 0.9547) Zero Point Vibrational Energy (zpe) 4551.4 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 mPW1PW91/6-31G(2df,p)
ABC
28.93250 0.37099 0.36629

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.311 -1.412 0.000
N2 0.354 -1.110 0.000
C3 0.000 0.049 0.000
O4 -0.474 1.111 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H11.00361.96273.0905
N21.00361.21122.3701
C31.96271.21121.1633
O43.09052.37011.1633

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 124.525 N2 C3 O4 172.967
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.318      
2 N -0.623      
3 C 0.588      
4 O -0.283      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.872 -0.860 0.000 2.060
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -13.418 -1.431 0.000
y -1.431 -18.023 0.000
z 0.000 0.000 -16.215
Traceless
 xyz
x 3.701 -1.431 0.000
y -1.431 -3.206 0.000
z 0.000 0.000 -0.494
Polar
3z2-r2-0.989
x2-y24.605
xy-1.431
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.269 -0.941 0.000
y -0.941 4.025 0.000
z 0.000 0.000 1.693


<r2> (average value of r2) Å2
<r2> 34.819
(<r2>)1/2 5.901