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/aug-cc-pVDZ

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/aug-cc-pVDZ
 hartrees
Energy at 0K-189.744488
Energy at 298.15K-189.748124
HF Energy-189.232329
Nuclear repulsion energy74.922574
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/aug-cc-pVDZ
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' 3228 3096 5.26      
2 A' 3098 2971 20.55      
3 A' 1481 1420 14.07      
4 A' 1438 1380 0.06      
5 A' 1250 1199 97.41      
6 A' 1185 1137 1.35      
7 A' 929 891 17.69      
8 A' 500 480 7.44      
9 A" 3221 3089 8.24      
10 A" 1470 1410 8.79      
11 A" 1133 1087 1.03      
12 A" 133 127 0.10      

Unscaled Zero Point Vibrational Energy (zpe) 9533.5 cm-1
Scaled (by 0.959) Zero Point Vibrational Energy (zpe) 9142.6 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 MP2/aug-cc-pVDZ
ABC
1.72421 0.38089 0.33231

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.992 -0.497 0.000
O2 0.000 0.574 0.000
O3 -1.203 0.072 0.000
H4 1.964 0.012 0.000
H5 0.855 -1.100 0.906
H6 0.855 -1.100 -0.906

Atom - Atom Distances (Å)
  C1 O2 O3 H4 H5 H6
C11.46032.26841.09691.09701.0970
O21.46031.30412.04312.08712.0871
O32.26841.30413.16822.53602.5360
H41.09692.04313.16821.81341.8134
H51.09702.08712.53601.81341.8116
H61.09702.08712.53601.81341.8116

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 110.152 O2 C1 H4 105.173
O2 C1 H5 108.559 O2 C1 H6 108.559
H4 C1 H5 111.486 H4 C1 H6 111.486
H5 C1 H6 111.312
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability