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: B3LYP/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at B3LYP/CEP-121G
 hartrees
Energy at 0K-46.091101
Energy at 298.15K-46.096923
HF Energy-46.091101
Nuclear repulsion energy69.495208
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 B3LYP/CEP-121G
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' 3095 3016 32.06      
2 A' 3034 2957 18.15      
3 A' 3007 2930 19.89      
4 A' 1526 1487 9.51      
5 A' 1511 1472 2.97      
6 A' 1439 1403 17.24      
7 A' 1378 1343 19.10      
8 A' 1135 1106 6.44      
9 A' 1099 1071 23.35      
10 A' 1015 989 18.40      
11 A' 808 788 7.66      
12 A' 469 457 9.34      
13 A' 288 281 1.47      
14 A" 3122 3042 57.80      
15 A" 3095 3016 0.01      
16 A" 1504 1466 9.23      
17 A" 1268 1235 0.00      
18 A" 1145 1116 5.71      
19 A" 810 789 1.86      
20 A" 206 201 0.57      
21 A" 60 58 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 15506.7 cm-1
Scaled (by 0.9745) Zero Point Vibrational Energy (zpe) 15111.2 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 B3LYP/CEP-121G
ABC
1.06754 0.13883 0.12890

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.512 0.962 0.000
C2 0.000 0.714 0.000
O3 -0.187 -0.785 0.000
O4 -1.530 -1.133 0.000
H5 1.704 2.043 0.000
H6 1.981 0.528 0.890
H7 1.981 0.528 -0.890
H8 -0.499 1.096 -0.897
H9 -0.499 1.096 0.897

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8 H9
C11.53212.43683.69381.09781.09571.09572.20622.2062
C21.53211.51012.39832.16092.17952.17951.09581.0958
O32.43681.51011.38773.40162.68622.68622.10772.1077
O43.69382.39831.38774.53273.98503.98502.61522.6152
H51.09782.16093.40164.53271.77871.77872.55992.5599
H61.09572.17952.68623.98501.77871.78013.10942.5445
H71.09572.17952.68623.98501.77871.78012.54453.1094
H82.20621.09582.10772.61522.55993.10942.54451.7942
H92.20621.09582.10772.61522.55992.54453.10941.7942

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 106.444 C1 C2 H8 113.138
C1 C2 H9 113.138 C2 C1 H5 109.391
C2 C1 H6 110.988 C2 C1 H7 110.988
C2 O3 O4 111.642 O3 C2 H8 106.882
O3 C2 H9 106.882 H5 C1 H6 108.373
H5 C1 H7 108.373 H6 C1 H7 108.652
H8 C2 H9 109.904
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.464      
2 C -0.116      
3 O -0.127      
4 O -0.127      
5 H 0.160      
6 H 0.172      
7 H 0.172      
8 H 0.165      
9 H 0.165      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.578 2.974 0.000 3.367
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.996 -1.178 0.000
y -1.178 -25.831 0.000
z 0.000 0.000 -23.355
Traceless
 xyz
x -1.403 -1.178 0.000
y -1.178 -1.155 0.000
z 0.000 0.000 2.559
Polar
3z2-r25.117
x2-y2-0.165
xy-1.178
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.034 1.248 0.000
y 1.248 4.987 0.000
z 0.000 0.000 3.879


<r2> (average value of r2) Å2
<r2> 77.773
(<r2>)1/2 8.819