return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: HF/6-311G*

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/6-311G*
 hartrees
Energy at 0K-167.764869
Energy at 298.15K-167.765922
Nuclear repulsion energy59.253247
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/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 4109 3716 177.54      
2 A' 2633 2381 179.68      
3 A' 1377 1245 156.98      
4 A' 1194 1080 56.61      
5 A' 521 471 23.37      
6 A" 592 536 18.61      

Unscaled Zero Point Vibrational Energy (zpe) 5213.2 cm-1
Scaled (by 0.9044) Zero Point Vibrational Energy (zpe) 4714.8 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 HF/6-311G*
ABC
23.83828 0.36675 0.36120

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.154 1.302 0.000
C2 0.000 0.184 0.000
O3 -0.209 -1.081 0.000
H4 0.599 -1.570 0.000

Atom - Atom Distances (Å)
  N1 C2 O3 H4
N11.12882.41122.9067
C21.12881.28251.8535
O32.41121.28250.9445
H42.90671.85350.9445

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 178.430 C2 O3 H4 111.764
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.382      
2 C 0.474      
3 O -0.568      
4 H 0.476      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.388 -3.831 0.000 4.075
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.645 -3.585 0.000
y -3.585 -18.369 0.000
z 0.000 0.000 -16.653
Traceless
 xyz
x 1.866 -3.585 0.000
y -3.585 -2.220 0.000
z 0.000 0.000 0.354
Polar
3z2-r20.709
x2-y22.724
xy-3.585
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.669 0.092 0.000
y 0.092 3.734 0.000
z 0.000 0.000 1.433


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