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 C2H5 (Ethyl radical)

using model chemistry: MP3=FULL/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 MP3=FULL/6-31G*
 hartrees
Energy at 0K-78.870856
Energy at 298.15K-78.874738
HF Energy-78.596872
Nuclear repulsion energy36.891648
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 MP3=FULL/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' 3231 3031 13.17      
2 A' 3139 2945 24.26      
3 A' 3061 2872 23.13      
4 A' 1547 1451 3.92      
5 A' 1532 1437 2.31      
6 A' 1469 1379 1.28      
7 A' 1104 1035 0.07      
8 A' 1031 967 0.31      
9 A' 460 432 54.28      
10 A" 3333 3127 15.82      
11 A" 3180 2984 20.55      
12 A" 1553 1457 4.69      
13 A" 1244 1168 2.35      
14 A" 838 787 2.06      
15 A" 150 141 0.36      

Unscaled Zero Point Vibrational Energy (zpe) 13435.1 cm-1
Scaled (by 0.9383) Zero Point Vibrational Energy (zpe) 12606.2 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 MP3=FULL/6-31G*
ABC
3.44912 0.75518 0.70105

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.013 -0.697 0.000
C2 -0.013 0.796 0.000
H3 1.008 -1.106 0.000
H4 -0.518 -1.095 0.886
H5 -0.518 -1.095 -0.886
H6 0.094 1.349 -0.925
H7 0.094 1.349 0.925

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7
C11.49291.10021.09411.09412.24812.2481
C21.49292.15902.14792.14791.08321.0832
H31.10022.15901.76411.76412.77842.7784
H41.09412.14791.76411.77123.10262.5198
H51.09412.14791.76411.77122.51983.1026
H62.24811.08322.77843.10262.51981.8501
H72.24811.08322.77842.51983.10261.8501

picture of Ethyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 120.712 C1 C2 H7 120.712
C2 C1 H3 111.847 C2 C1 H4 111.323
C2 C1 H5 111.323 H3 C1 H4 107.016
H3 C1 H5 107.016 H4 C1 H5 108.081
H6 C2 H7 117.289
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability