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

using model chemistry: B3PW91/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/cc-pVDZ
 hartrees
Energy at 0K-168.627686
Energy at 298.15K-168.628717
Nuclear repulsion energy58.991893
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 B3PW91/cc-pVDZ
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' 3670 3542 138.27      
2 A' 2365 2282 626.68      
3 A' 1339 1292 0.30      
4 A' 820 791 190.25      
5 A' 560 541 72.82      
6 A" 626 604 3.33      

Unscaled Zero Point Vibrational Energy (zpe) 4689.7 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 4525.6 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 B3PW91/cc-pVDZ
ABC
26.67497 0.36708 0.36210

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.396 -1.324 0.000
N2 0.407 -1.101 0.000
C3 0.000 0.050 0.000
O4 -0.531 1.092 0.000

Atom - Atom Distances (Å)
  H1 N2 C3 O4
H11.01371.95843.0901
N21.01371.22062.3853
C31.95841.22061.1698
O43.09012.38531.1698

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 122.179 N2 C3 O4 172.501
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.159      
2 N -0.248      
3 C 0.245      
4 O -0.156      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.946 -0.718 0.000 2.074
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -13.316 -1.142 0.000
y -1.142 -18.329 0.000
z 0.000 0.000 -16.218
Traceless
 xyz
x 3.958 -1.142 0.000
y -1.142 -3.563 0.000
z 0.000 0.000 -0.395
Polar
3z2-r2-0.791
x2-y25.014
xy-1.142
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 35.122
(<r2>)1/2 5.926