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: ROHF/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A"
Energy calculated at ROHF/6-31+G**
 hartrees
Energy at 0K-189.205996
Energy at 298.15K-189.209803
Nuclear repulsion energy75.860412
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 ROHF/6-31+G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3320 2842 19.02      
2 A' 3214 2751 33.57      
3 A' 1627 1393 11.11      
4 A' 1595 1365 1.79      
5 A' 1336 1143 11.26      
6 A' 1276 1092 60.95      
7 A' 1056 904 33.60      
8 A' 533 456 3.95      
9 A" 3301 2825 33.51      
10 A" 1609 1377 6.50      
11 A" 1271 1088 3.13      
12 A" 192 164 1.51      

Unscaled Zero Point Vibrational Energy (zpe) 10164.3 cm-1
Scaled (by 0.8559) Zero Point Vibrational Energy (zpe) 8699.6 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 ROHF/6-31+G**
ABC
1.79942 0.38889 0.34035

See section I.F.4 to change rotational constant units
Geometric Data calculated at ROHF/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.984 -0.462 0.000
O2 0.000 0.558 0.000
O3 -1.201 0.049 0.000
H4 1.932 0.055 0.000
H5 0.886 -1.071 0.889
H6 0.886 -1.071 -0.889

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5 H6
C11.41692.24341.08041.08191.0819
O21.41691.30391.99692.05612.0561
O32.24341.30393.13322.52962.5296
H41.08041.99693.13321.77551.7755
H51.08192.05612.52961.77551.7781
H61.08192.05612.52961.77551.7781

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 111.013 O2 C1 H4 105.397
O2 C1 H5 110.012 O2 C1 H6 110.012
H4 C1 H5 110.392 H4 C1 H6 110.392
H5 C1 H6 110.519
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROHF/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.136      
2 O -0.227      
3 O -0.060      
4 H 0.144      
5 H 0.140      
6 H 0.140      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.054 -1.401 0.000 2.486
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -17.137 -0.433 0.001
y -0.433 -18.481 -0.001
z 0.001 -0.001 -17.007
Traceless
 xyz
x 0.607 -0.433 0.001
y -0.433 -1.409 -0.001
z 0.001 -0.001 0.802
Polar
3z2-r21.605
x2-y21.344
xy-0.433
xz0.001
yz-0.001


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


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000