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: MP2/LANL2DZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A"
Energy calculated at MP2/LANL2DZ
 hartrees
Energy at 0K-189.472468
Energy at 298.15K-189.476026
HF Energy-189.172905
Nuclear repulsion energy72.165744
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 MP2/LANL2DZ
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' 3217 3098 13.60      
2 A' 3064 2951 25.68      
3 A' 1530 1474 16.28      
4 A' 1486 1431 19.64      
5 A' 1380 1329 119.08      
6 A' 1171 1128 0.14      
7 A' 868 836 18.02      
8 A' 457 441 4.53      
9 A" 3199 3081 27.26      
10 A" 1513 1457 10.17      
11 A" 1134 1092 0.36      
12 A" 118 114 1.40      

Unscaled Zero Point Vibrational Energy (zpe) 9568.8 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 9215.7 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 MP2/LANL2DZ
ABC
1.64104 0.34893 0.30504

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/LANL2DZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.048 -0.499 0.000
O2 0.000 0.590 0.000
O3 -1.267 0.055 0.000
H4 1.997 0.050 0.000
H5 0.927 -1.106 0.908
H6 0.927 -1.106 -0.908

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5 H6
C11.51082.38001.09721.09861.0986
O21.51081.37552.06902.13522.1352
O32.38001.37553.26462.64302.6430
H41.09722.06903.26461.81831.8183
H51.09862.13522.64301.81831.8154
H61.09862.13522.64301.81831.8154

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 111.001 O2 C1 H4 103.862
O2 C1 H5 108.794 O2 C1 H6 108.794
H4 C1 H5 111.808 H4 C1 H6 111.808
H5 C1 H6 111.424
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability