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All results from a given calculation for HOCN (cyanic acid)

using model chemistry: B3PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/3-21G*
 hartrees
Energy at 0K-167.626939
Energy at 298.15K-167.627840
Nuclear repulsion energy57.299672
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 B3PW91/3-21G*
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' 3508 3366 86.78      
2 A' 2342 2247 58.20      
3 A' 1246 1196 105.77      
4 A' 1037 995 93.14      
5 A' 459 440 20.48      
6 A" 487 467 2.54      

Unscaled Zero Point Vibrational Energy (zpe) 4539.1 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 4354.8 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 B3PW91/3-21G*
ABC
21.81864 0.34413 0.33879

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.102 1.352 0.000
C2 0.000 0.186 0.000
O3 -0.175 -1.121 0.000
H4 0.688 -1.615 0.000

Atom - Atom Distances (Å)
  N1 C2 O3 H4
N11.17022.48793.0240
C21.17021.31831.9278
O32.48791.31830.9947
H43.02401.92780.9947

picture of cyanic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 O3 177.360 C2 O3 H4 112.160
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.409      
2 C 0.573      
3 O -0.584      
4 H 0.420      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.686 -3.478 0.000 3.865
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.159 -3.563 0.000
y -3.563 -18.014 0.000
z 0.000 0.000 -16.359
Traceless
 xyz
x 2.027 -3.563 0.000
y -3.563 -2.255 0.000
z 0.000 0.000 0.228
Polar
3z2-r20.456
x2-y22.855
xy-3.563
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.369 -0.069 0.000
y -0.069 3.853 0.000
z 0.000 0.000 1.003


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000