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

using model chemistry: HF/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 HF/3-21G*
 hartrees
Energy at 0K-166.779587
Energy at 298.15K-166.780565
Nuclear repulsion energy58.283074
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 HF/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' 3833 3460 167.69      
2 A' 2591 2339 83.38      
3 A' 1346 1215 145.63      
4 A' 1111 1003 85.58      
5 A' 494 445 23.65      
6 A" 528 477 17.28      

Unscaled Zero Point Vibrational Energy (zpe) 4951.4 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 4469.1 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 HF/3-21G*
ABC
23.43766 0.35482 0.34953

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.162 1.321 0.000
C2 0.000 0.193 0.000
O3 -0.216 -1.097 0.000
H4 0.592 -1.635 0.000

Atom - Atom Distances (Å)
  N1 C2 O3 H4
N11.13972.44762.9871
C21.13971.30801.9213
O32.44761.30800.9703
H42.98711.92130.9703

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 178.681 C2 O3 H4 114.162
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.429      
2 C 0.683      
3 O -0.703      
4 H 0.449      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.624 -3.543 0.000 3.897
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.653 -3.926 0.000
y -3.926 -18.617 0.000
z 0.000 0.000 -16.421
Traceless
 xyz
x 1.866 -3.926 0.000
y -3.926 -2.580 0.000
z 0.000 0.000 0.714
Polar
3z2-r21.427
x2-y22.964
xy-3.926
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.255 0.041 0.000
y 0.041 3.503 0.000
z 0.000 0.000 0.919


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