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: CCSD(T)/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 CCSD(T)/cc-pVDZ
 hartrees
Energy at 0K-228.952108
Energy at 298.15K-228.958062
HF Energy-228.258810
Nuclear repulsion energy123.212558
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 CCSD(T)/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' 3152 3086        
2 A' 3071 3006        
3 A' 3060 2995        
4 A' 1501 1470        
5 A' 1489 1457        
6 A' 1416 1385        
7 A' 1366 1337        
8 A' 1151 1126        
9 A' 1130 1106        
10 A' 1052 1030        
11 A' 860 842        
12 A' 510 499        
13 A' 303 297        
14 A" 3157 3090        
15 A" 3129 3063        
16 A" 1473 1442        
17 A" 1275 1248        
18 A" 1156 1131        
19 A" 803 786        
20 A" 219 215        
21 A" 88 86        

Unscaled Zero Point Vibrational Energy (zpe) 15680.8 cm-1
Scaled (by 0.9788) Zero Point Vibrational Energy (zpe) 15348.4 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 CCSD(T)/cc-pVDZ
ABC
1.09430 0.14680 0.13625

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.503 0.909 0.000
C2 0.000 0.672 0.000
O3 -0.205 -0.772 0.000
O4 -1.504 -1.049 0.000
H5 1.707 1.995 0.000
H6 1.968 0.463 0.897
H7 1.968 0.463 -0.897
H8 -0.493 1.081 -0.900
H9 -0.493 1.081 0.900

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8 H9
C11.52142.39603.58881.10491.10491.10492.19682.1968
C21.52141.45832.28612.15972.17312.17311.10541.1054
O32.39601.45831.32913.36302.65542.65542.08052.0805
O43.58882.28611.32914.42513.89243.89242.52442.5244
H51.10492.15973.36304.42511.79441.79442.54722.5472
H61.10492.17312.65543.89241.79441.79493.11032.5380
H71.10492.17312.65543.89241.79441.79492.53803.1103
H82.19681.10542.08052.52442.54723.11032.53801.8010
H92.19681.10542.08052.52442.54722.53803.11031.8010

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 107.031 C1 C2 H8 112.537
C1 C2 H9 112.537 C2 C1 H5 109.616
C2 C1 H6 110.671 C2 C1 H7 110.671
C2 O3 O4 110.118 O3 C2 H8 107.697
O3 C2 H9 107.697 H5 C1 H6 108.593
H5 C1 H7 108.593 H6 C1 H7 108.640
H8 C2 H9 109.098
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability