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: 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-168.607828
Energy at 298.15K-168.608657
Nuclear repulsion energy57.259795
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' 3614 3586 88.56      
2 A' 2279 2262 86.62      
3 A' 1206 1197 90.26      
4 A' 1048 1040 66.08      
5 A' 408 405 12.97      
6 A" 458 454 1.08      

Unscaled Zero Point Vibrational Energy (zpe) 4506.6 cm-1
Scaled (by 0.9923) Zero Point Vibrational Energy (zpe) 4471.9 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
21.59726 0.34342 0.33804

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)
N1 0.036 1.358 0.000
C2 0.000 0.180 0.000
O3 -0.127 -1.131 0.000
H4 0.763 -1.544 0.000

Atom - Atom Distances (Å)
  N1 C2 O3 H4
N11.17882.49422.9925
C21.17881.31681.8859
O32.49421.31680.9815
H42.99251.88590.9815

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 176.216 C2 O3 H4 109.416
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.384      
2 C 0.468      
3 O -0.435      
4 H 0.351      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.520 -3.513 0.000 3.828
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.861 -2.939 0.000
y -2.939 -17.961 0.000
z 0.000 0.000 -16.462
Traceless
 xyz
x 2.350 -2.939 0.000
y -2.939 -2.299 0.000
z 0.000 0.000 -0.051
Polar
3z2-r2-0.102
x2-y23.099
xy-2.939
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.731 -0.146 0.000
y -0.146 4.275 0.000
z 0.000 0.000 1.422


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