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 C2H5OO (ethylperoxy radical)

using model chemistry: MP2=FULL/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 MP2=FULL/6-31+G**
 hartrees
Energy at 0K-228.899584
Energy at 298.15K-228.905584
HF Energy-228.255119
Nuclear repulsion energy124.114345
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=FULL/6-31+G**
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' 3236 3039 12.03      
2 A' 3166 2974 13.66      
3 A' 3137 2946 9.98      
4 A' 1557 1463 4.34      
5 A' 1548 1454 2.96      
6 A' 1467 1378 17.36      
7 A' 1414 1328 5.35      
8 A' 1270 1193 149.09      
9 A' 1170 1099 7.01      
10 A' 1062 998 17.33      
11 A' 872 819 5.90      
12 A' 514 483 11.15      
13 A' 315 296 1.51      
14 A" 3253 3055 23.38      
15 A" 3234 3037 0.20      
16 A" 1533 1440 7.58      
17 A" 1306 1227 0.14      
18 A" 1182 1110 4.19      
19 A" 826 776 0.48      
20 A" 244 229 0.44      
21 A" 68 64 0.21      

Unscaled Zero Point Vibrational Energy (zpe) 16187.6 cm-1
Scaled (by 0.9392) Zero Point Vibrational Energy (zpe) 15203.4 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=FULL/6-31+G**
ABC
1.11106 0.14840 0.13770

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31+G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.491 0.905 0.000
C2 0.000 0.684 0.000
O3 -0.208 -0.766 0.000
O4 -1.487 -1.058 0.000
H5 1.698 1.973 0.000
H6 1.946 0.466 0.885
H7 1.946 0.466 -0.885
H8 -0.488 1.074 -0.890
H9 -0.488 1.074 0.890

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8 H9
C11.50752.38333.56681.08831.08711.08712.17642.1764
C21.50751.46512.29022.13162.14872.14871.08701.0870
O32.38331.46511.31173.33722.63462.63462.06302.0630
O43.56682.29021.31174.39653.85883.85882.51682.5168
H51.08832.13163.33724.39651.76531.76532.52512.5251
H61.08712.14872.63463.85881.76531.76953.07262.5083
H71.08712.14872.63463.85881.76531.76952.50833.0726
H82.17641.08702.06302.51682.52513.07262.50831.7797
H92.17641.08702.06302.51682.52512.50833.07261.7797

picture of ethylperoxy radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 106.585 C1 C2 H8 113.035
C1 C2 H9 113.035 C2 C1 H5 109.341
C2 C1 H6 110.770 C2 C1 H7 110.770
C2 O3 O4 111.007 O3 C2 H8 106.933
O3 C2 H9 106.933 H5 C1 H6 108.477
H5 C1 H7 108.477 H6 C1 H7 108.944
H8 C2 H9 109.893
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability