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: CISD/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at CISD/6-31G
 hartrees
Energy at 0K-228.535868
Energy at 298.15K-228.541859
HF Energy-228.149544
Nuclear repulsion energy121.422784
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 CISD/6-31G
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' 3189 2990 22.19      
2 A' 3142 2947 11.99      
3 A' 3112 2918 13.84      
4 A' 1604 1504 4.06      
5 A' 1588 1489 5.71      
6 A' 1518 1423 12.35      
7 A' 1460 1369 15.01      
8 A' 1193 1119 7.79      
9 A' 1113 1044 89.48      
10 A' 1064 998 6.81      
11 A' 865 811 7.73      
12 A' 499 468 7.84      
13 A' 306 287 1.02      
14 A" 3212 3012 42.73      
15 A" 3189 2991 0.17      
16 A" 1576 1478 6.93      
17 A" 1340 1257 0.02      
18 A" 1221 1145 6.23      
19 A" 863 810 0.95      
20 A" 234 219 0.85      
21 A" 80 75 0.16      

Unscaled Zero Point Vibrational Energy (zpe) 16182.5 cm-1
Scaled (by 0.9378) Zero Point Vibrational Energy (zpe) 15175.9 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 CISD/6-31G
ABC
1.07704 0.14207 0.13178

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.505 0.937 0.000
C2 0.000 0.702 0.000
O3 -0.185 -0.774 0.000
O4 -1.525 -1.105 0.000
H5 1.712 2.012 0.000
H6 1.963 0.494 0.888
H7 1.963 0.494 -0.888
H8 -0.490 1.097 -0.892
H9 -0.490 1.097 0.892

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8 H9
C11.52282.40533.65381.09481.09321.09322.19102.1910
C21.52281.48822.36482.15542.16462.16461.09181.0918
O32.40531.48821.38013.37102.64822.64822.09522.0952
O43.65382.36481.38014.49383.93873.93872.59132.5913
H51.09482.15543.37104.49381.77681.77682.54602.5460
H61.09322.16462.64823.93871.77681.77543.09042.5263
H71.09322.16462.64823.93871.77681.77542.52633.0904
H82.19101.09182.09522.59132.54603.09042.52631.7846
H92.19101.09182.09522.59132.54602.52633.09041.7846

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 106.035 C1 C2 H8 112.819
C1 C2 H9 112.819 C2 C1 H5 109.780
C2 C1 H6 110.606 C2 C1 H7 110.606
C2 O3 O4 111.016 O3 C2 H8 107.607
O3 C2 H9 107.607 H5 C1 H6 108.599
H5 C1 H7 108.599 H6 C1 H7 108.595
H8 C2 H9 109.630
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability