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 HOCl (hypochlorous acid)

using model chemistry: TPSSh/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at TPSSh/STO-3G
 hartrees
Energy at 0K-529.932987
Energy at 298.15K-529.934080
HF Energy-529.932987
Nuclear repulsion energy47.981723
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 TPSSh/STO-3G
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' 3621 3621 27.68 42.04 0.31 0.48
2 A' 1339 1339 19.10 8.71 0.62 0.77
3 A' 837 837 7.11 9.23 0.33 0.50

Unscaled Zero Point Vibrational Energy (zpe) 2898.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 2898.6 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 TPSSh/STO-3G
ABC
16.76852 0.44664 0.43505

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.040 1.176 0.000
H2 -0.995 1.307 0.000
Cl3 0.040 -0.631 0.000

Atom - Atom Distances (Å)
  O1 H2 Cl3
O11.04331.8069
H21.04332.1967
Cl31.80692.1967

picture of hypochlorous acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 O1 Cl3 97.189
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at TPSSh/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.118      
2 H 0.201      
3 Cl -0.082      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.400 1.161 0.000 1.819
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.689 -0.358 0.000
y -0.358 2.210 0.000
z 0.000 0.000 0.054


<r2> (average value of r2) Å2
<r2> 30.572
(<r2>)1/2 5.529