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

using model chemistry: B3LYP/LANL2DZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/LANL2DZ
 hartrees
Energy at 0K-168.644520
Energy at 298.15K-168.645181
Nuclear repulsion energy58.193303
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 B3LYP/LANL2DZ
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' 3866 3716 346.63      
2 A' 2343 2253 637.43      
3 A' 1289 1239 13.96      
4 A' 586 563 4.94      
5 A' 305 293 345.78      
6 A" 593 570 0.15      

Unscaled Zero Point Vibrational Energy (zpe) 4490.7 cm-1
Scaled (by 0.9612) Zero Point Vibrational Energy (zpe) 4316.5 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 B3LYP/LANL2DZ
ABC
78.09089 0.35089 0.34932

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/LANL2DZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.377 -1.577 0.000
N2 0.534 -1.038 0.000
C3 0.000 0.047 0.000
O4 -0.639 1.070 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H11.00062.12883.3272
N21.00061.20862.4121
C32.12881.20861.2065
O43.32722.41211.2065

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 148.834 N2 C3 O4 174.221
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/LANL2DZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.350      
2 N -0.366      
3 C 0.234      
4 O -0.218      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.495 -1.917 0.000 3.146
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.140 -1.431 0.000
y -1.431 -17.675 0.000
z 0.000 0.000 -16.632
Traceless
 xyz
x 3.014 -1.431 0.000
y -1.431 -2.289 0.000
z 0.000 0.000 -0.724
Polar
3z2-r2-1.449
x2-y23.536
xy-1.431
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.088 -1.534 0.000
y -1.534 4.055 0.000
z 0.000 0.000 1.196


<r2> (average value of r2) Å2
<r2> 30.990
(<r2>)1/2 5.567