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: B3PW91/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/6-31G(2df,p)
 hartrees
Energy at 0K-168.582077
Energy at 298.15K-168.583048
Nuclear repulsion energy58.210479
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 B3PW91/6-31G(2df,p)
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' 3800 3654 144.75      
2 A' 2402 2310 115.62      
3 A' 1245 1197 91.10      
4 A' 1119 1076 69.41      
5 A' 479 460 14.98      
6 A" 539 518 5.13      

Unscaled Zero Point Vibrational Energy (zpe) 4791.7 cm-1
Scaled (by 0.9614) Zero Point Vibrational Energy (zpe) 4606.7 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 B3PW91/6-31G(2df,p)
ABC
22.43018 0.35486 0.34933

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.087 1.334 0.000
C2 0.000 0.178 0.000
O3 -0.163 -1.107 0.000
H4 0.696 -1.550 0.000

Atom - Atom Distances (Å)
  N1 C2 O3 H4
N11.15922.45332.9475
C21.15921.29491.8627
O32.45331.29490.9662
H42.94751.86270.9662

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 177.064 C2 O3 H4 110.087
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.395      
2 C 0.422      
3 O -0.390      
4 H 0.363      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.303 -3.699 0.000 3.922
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -14.938 -2.973 0.000
y -2.973 -17.718 0.000
z 0.000 0.000 -16.351
Traceless
 xyz
x 2.097 -2.973 0.000
y -2.973 -2.074 0.000
z 0.000 0.000 -0.023
Polar
3z2-r2-0.046
x2-y22.780
xy-2.973
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.971 -0.028 0.000
y -0.028 4.127 0.000
z 0.000 0.000 1.772


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