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/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-167.800876
Energy at 298.15K-167.801942
HF Energy-167.800876
Nuclear repulsion energy59.310814
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/Def2TZVPP
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' 4094 3711 221.04      
2 A' 2616 2371 187.99      
3 A' 1362 1235 120.23      
4 A' 1195 1083 62.80      
5 A' 531 481 19.80      
6 A" 598 542 14.80      

Unscaled Zero Point Vibrational Energy (zpe) 5197.5 cm-1
Scaled (by 0.9064) Zero Point Vibrational Energy (zpe) 4711.0 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/Def2TZVPP
ABC
23.73079 0.36762 0.36201

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.112 1.305 0.000
C2 0.000 0.183 0.000
O3 -0.179 -1.086 0.000
H4 0.648 -1.546 0.000

Atom - Atom Distances (Å)
  N1 C2 O3 H4
N11.12712.40882.9005
C21.12711.28221.8464
O32.40881.28220.9455
H42.90051.84640.9455

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 177.674 C2 O3 H4 111.051
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.200      
2 C 0.268      
3 O -0.338      
4 H 0.270      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.202 -3.893 0.000 4.075
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.630 -3.272 0.000
y -3.272 -18.385 0.000
z 0.000 0.000 -16.761
Traceless
 xyz
x 1.943 -3.272 0.000
y -3.272 -2.190 0.000
z 0.000 0.000 0.246
Polar
3z2-r20.493
x2-y22.755
xy-3.272
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.109 0.085 0.000
y 0.085 4.037 0.000
z 0.000 0.000 1.944


<r2> (average value of r2) Å2
<r2> 35.284
(<r2>)1/2 5.940