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: B3LYP/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A"
Energy calculated at B3LYP/3-21G*
 hartrees
Energy at 0K-150.068933
Energy at 298.15K-150.070021
HF Energy-150.068933
Nuclear repulsion energy30.213011
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 B3LYP/3-21G*
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' 3293 3168 1.98      
2 A' 1341 1290 36.51      
3 A' 1097 1055 30.47      

Unscaled Zero Point Vibrational Energy (zpe) 2865.5 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 2756.6 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 B3LYP/3-21G*
ABC
18.90007 0.98619 0.93728

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.056 -0.643 0.000
O2 0.056 0.761 0.000
H3 -0.904 -0.941 0.000

Atom - Atom Distances (Å)
  O1 O2 H3
O11.40421.0055
O21.40421.9544
H31.00551.9544

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 107.239
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.279      
2 O -0.103      
3 H 0.382      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.973 -1.120 0.000 2.269
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -9.352 1.737 0.000
y 1.737 -10.441 0.000
z 0.000 0.000 -10.411
Traceless
 xyz
x 1.073 1.737 0.000
y 1.737 -0.559 0.000
z 0.000 0.000 -0.514
Polar
3z2-r2-1.028
x2-y21.089
xy1.737
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.841 0.339 0.000
y 0.339 1.986 0.000
z 0.000 0.000 0.337


<r2> (average value of r2) Å2
<r2> 16.119
(<r2>)1/2 4.015