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: BLYP/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at BLYP/3-21G
 hartrees
Energy at 0K-228.217195
Energy at 298.15K-228.222925
HF Energy-228.217195
Nuclear repulsion energy119.113108
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 BLYP/3-21G
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' 3053 3036 17.51      
2 A' 3010 2993 9.87      
3 A' 2992 2975 9.23      
4 A' 1534 1525 6.70      
5 A' 1513 1504 1.65      
6 A' 1425 1417 9.96      
7 A' 1316 1308 20.70      
8 A' 1106 1100 6.24      
9 A' 1040 1034 6.25      
10 A' 957 952 13.28      
11 A' 764 760 1.85      
12 A' 443 441 9.16      
13 A' 271 269 0.70      
14 A" 3076 3059 37.32      
15 A" 3049 3032 0.06      
16 A" 1517 1508 7.49      
17 A" 1258 1251 0.55      
18 A" 1094 1088 3.35      
19 A" 814 810 2.91      
20 A" 203 202 0.33      
21 A" 72 71 0.13      

Unscaled Zero Point Vibrational Energy (zpe) 15251.8 cm-1
Scaled (by 0.9945) Zero Point Vibrational Energy (zpe) 15167.9 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 BLYP/3-21G
ABC
1.01886 0.13803 0.12754

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.510 0.979 0.000
C2 0.000 0.704 0.000
O3 -0.152 -0.820 0.000
O4 -1.560 -1.106 0.000
H5 1.692 2.066 0.000
H6 1.978 0.541 0.895
H7 1.978 0.541 -0.895
H8 -0.504 1.081 -0.901
H9 -0.504 1.081 0.901

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8 H9
C11.53492.44943.71121.10231.10081.10082.20902.2090
C21.53491.53182.38952.17212.17752.17751.09911.0991
O32.44941.53181.43693.42512.68232.68232.13292.1329
O43.71122.38951.43694.54294.00474.00472.58982.5898
H51.10232.17213.42514.54291.79101.79102.57032.5703
H61.10082.17752.68234.00471.79101.79023.11132.5405
H71.10082.17752.68234.00471.79101.79022.54053.1113
H82.20901.09912.13292.58982.57033.11132.54051.8021
H92.20901.09912.13292.58982.57032.54053.11131.8021

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 106.018 C1 C2 H8 112.952
C1 C2 H9 112.952 C2 C1 H5 109.816
C2 C1 H6 110.327 C2 C1 H7 110.327
C2 O3 O4 107.157 O3 C2 H8 107.184
O3 C2 H9 107.184 H5 C1 H6 108.766
H5 C1 H7 108.766 H6 C1 H7 108.799
H8 C2 H9 110.131
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.555      
2 C -0.153      
3 O -0.177      
4 O -0.131      
5 H 0.194      
6 H 0.204      
7 H 0.204      
8 H 0.208      
9 H 0.208      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.377 2.442 0.000 2.804
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -24.956 -0.996 0.000
y -0.996 -24.794 0.000
z 0.000 0.000 -22.971
Traceless
 xyz
x -1.074 -0.996 0.000
y -0.996 -0.831 0.000
z 0.000 0.000 1.904
Polar
3z2-r23.809
x2-y2-0.162
xy-0.996
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.293 1.164 0.000
y 1.164 4.302 0.000
z 0.000 0.000 3.304


<r2> (average value of r2) Å2
<r2> 93.987
(<r2>)1/2 9.695