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 CH3OO (methylperoxy radical)

using model chemistry: B1B95/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A"
Energy calculated at B1B95/CEP-31G
 hartrees
Energy at 0K-39.173610
Energy at 298.15K-39.177140
HF Energy-39.173610
Nuclear repulsion energy42.444242
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 B1B95/CEP-31G
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' 3222 3086 19.78      
2 A' 3086 2955 19.35      
3 A' 1491 1427 14.59      
4 A' 1443 1382 1.51      
5 A' 1192 1141 7.45      
6 A' 1128 1080 9.08      
7 A' 905 867 8.34      
8 A' 446 427 5.19      
9 A" 3208 3071 34.01      
10 A" 1475 1412 13.60      
11 A" 1116 1068 0.00      
12 A" 115 110 0.90      

Unscaled Zero Point Vibrational Energy (zpe) 9412.9 cm-1
Scaled (by 0.9575) Zero Point Vibrational Energy (zpe) 9012.9 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 B1B95/CEP-31G
ABC
1.67854 0.35480 0.31069

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/CEP-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.040 -0.473 0.000
O2 0.000 0.580 0.000
O3 -1.262 0.038 0.000
H4 1.993 0.071 0.000
H5 0.931 -1.087 0.905
H6 0.931 -1.087 -0.905

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5 H6
C11.47982.35751.09781.09861.0986
O21.47981.37322.05722.11282.1128
O32.35751.37323.25512.62542.6254
H41.09782.05723.25511.81291.8129
H51.09862.11282.62541.81291.8091
H61.09862.11282.62541.81291.8091

picture of methylperoxy radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 O3 111.394 O2 C1 H4 104.938
O2 C1 H5 109.163 O2 C1 H6 109.163
H4 C1 H5 111.263 H4 C1 H6 111.263
H5 C1 H6 110.850
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.373      
2 O -0.087      
3 O -0.153      
4 H 0.207      
5 H 0.203      
6 H 0.203      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.912 -1.632 0.000 3.338
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.380 -0.524 0.000
y -0.524 -18.158 0.000
z 0.000 0.000 -16.631
Traceless
 xyz
x 0.015 -0.524 0.000
y -0.524 -1.153 0.000
z 0.000 0.000 1.138
Polar
3z2-r22.276
x2-y20.778
xy-0.524
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.141 0.162 0.000
y 0.162 2.139 0.000
z 0.000 0.000 1.897


<r2> (average value of r2) Å2
<r2> 37.370
(<r2>)1/2 6.113