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 HO2 (Hydroperoxy radical)

using model chemistry: HF/SDD

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A"
Energy calculated at HF/SDD
 hartrees
Energy at 0K-150.160902
Energy at 298.15K-150.161983
HF Energy-150.160902
Nuclear repulsion energy31.299859
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/SDD
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' 3987 3590 46.14      
2 A' 1521 1370 48.58      
3 A' 1012 911 30.54      

Unscaled Zero Point Vibrational Energy (zpe) 3259.8 cm-1
Scaled (by 0.9004) Zero Point Vibrational Energy (zpe) 2935.1 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/SDD
ABC
22.02277 1.04868 1.00102

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.054 -0.629 0.000
O2 0.054 0.744 0.000
H3 -0.860 -0.920 0.000

Atom - Atom Distances (Å)
  O1 O2 H3
O11.37370.9587
O21.37371.8987
H30.95871.8987

picture of Hydroperoxy radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O2 O1 H3 107.657
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.386      
2 O -0.029      
3 H 0.415      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -2.215 -0.835 0.000 2.367
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -9.933 2.079 0.000
y 2.079 -11.248 0.000
z 0.000 0.000 -10.880
Traceless
 xyz
x 1.130 2.079 0.000
y 2.079 -0.841 0.000
z 0.000 0.000 -0.289
Polar
3z2-r2-0.578
x2-y21.314
xy2.079
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.808 0.248 0.000
y 0.248 2.102 0.000
z 0.000 0.000 0.449


<r2> (average value of r2) Å2
<r2> 15.908
(<r2>)1/2 3.988