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

using model chemistry: BLYP/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at BLYP/6-31G*
 hartrees
Energy at 0K-168.650451
Energy at 298.15K-168.651425
HF Energy-168.650451
Nuclear repulsion energy58.294484
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 BLYP/6-31G*
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' 3552 3523 87.76      
2 A' 2271 2252 468.79      
3 A' 1277 1267 0.34      
4 A' 811 804 220.35      
5 A' 543 538 44.22      
6 A" 579 574 0.39      

Unscaled Zero Point Vibrational Energy (zpe) 4515.8 cm-1
Scaled (by 0.9919) Zero Point Vibrational Energy (zpe) 4479.2 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 BLYP/6-31G*
ABC
26.99689 0.35822 0.35353

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.827 -0.753 0.000
N2 0.816 -0.847 0.000
C3 0.000 0.071 0.000
O4 -0.943 0.782 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H11.01482.00383.1664
N21.01481.22842.3978
C32.00381.22841.1811
O43.16642.39781.1811

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 126.317 N2 C3 O4 168.701
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.343      
2 N -0.574      
3 C 0.592      
4 O -0.361      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.119 -0.315 0.000 2.142
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -13.060 -0.135 0.000
y -0.135 -18.640 0.000
z 0.000 0.000 -16.342
Traceless
 xyz
x 4.431 -0.135 0.000
y -0.135 -3.939 0.000
z 0.000 0.000 -0.492
Polar
3z2-r2-0.984
x2-y25.580
xy-0.135
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.775 -1.459 0.000
y -1.459 3.425 0.000
z 0.000 0.000 1.317


<r2> (average value of r2) Å2
<r2> 35.782
(<r2>)1/2 5.982