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: PBEPBE/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at PBEPBE/Def2TZVPP
 hartrees
Energy at 0K-79.066017
Energy at 298.15K-79.069769
HF Energy-79.066017
Nuclear repulsion energy36.875258
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 PBEPBE/Def2TZVPP
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' 3085 3048 15.43      
2 A' 2978 2942 19.79      
3 A' 2880 2845 24.53      
4 A' 1430 1413 2.13      
5 A' 1415 1398 3.62      
6 A' 1343 1326 3.10      
7 A' 1058 1046 0.22      
8 A' 940 929 0.69      
9 A' 488 482 56.59      
10 A" 3185 3146 12.83      
11 A" 3027 2990 17.13      
12 A" 1426 1409 5.75      
13 A" 1151 1137 2.53      
14 A" 787 778 2.50      
15 A" 92 91 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 12642.8 cm-1
Scaled (by 0.9879) Zero Point Vibrational Energy (zpe) 12489.9 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 PBEPBE/Def2TZVPP
ABC
3.43025 0.75951 0.70299

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.019 -0.645 0.000
C2 0.019 0.774 0.000
H3 1.011 -1.166 0.000
H4 -0.464 -1.155 0.866
H5 -0.464 -1.155 -0.866
H6 -0.157 1.353 -0.916
H7 -0.157 1.353 0.916

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7
C11.41931.12071.11511.11512.20522.2052
C21.41932.17932.16922.16921.09771.0977
H31.12072.17931.71071.71072.92402.9240
H41.11512.16921.71071.73203.09212.5275
H51.11512.16921.71071.73202.52753.0921
H62.20521.09772.92403.09212.52751.8319
H72.20521.09772.92402.52753.09211.8319

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 121.832 C1 C2 H7 121.832
C2 C1 H3 117.701 C2 C1 H4 117.216
C2 C1 H5 117.216 H3 C1 H4 99.842
H3 C1 H5 99.842 H4 C1 H5 101.910
H6 C2 H7 113.101
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/Def2TZVPP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.217      
2 C -0.247      
3 H 0.092      
4 H 0.089      
5 H 0.089      
6 H 0.097      
7 H 0.097      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.120 -0.321 0.000 0.343
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.448 0.151 0.000
y 0.151 -14.507 0.000
z 0.000 0.000 -13.752
Traceless
 xyz
x -1.318 0.151 0.000
y 0.151 0.093 0.000
z 0.000 0.000 1.226
Polar
3z2-r22.451
x2-y2-0.941
xy0.151
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.517 -0.072 0.000
y -0.072 4.693 0.000
z 0.000 0.000 3.845


<r2> (average value of r2) Å2
<r2> 27.932
(<r2>)1/2 5.285