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: wB97X-D/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 wB97X-D/3-21G*
 hartrees
Energy at 0K-78.698845
Energy at 298.15K-78.702616
HF Energy-78.698845
Nuclear repulsion energy36.826811
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 wB97X-D/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' 3185 3019 12.00      
2 A' 3105 2942 19.03      
3 A' 3019 2861 18.90      
4 A' 1554 1473 9.06      
5 A' 1507 1428 0.37      
6 A' 1469 1392 9.81      
7 A' 1055 999 0.39      
8 A' 1024 971 2.44      
9 A' 449 426 76.37      
10 A" 3294 3122 13.57      
11 A" 3149 2984 15.17      
12 A" 1559 1477 8.03      
13 A" 1234 1169 4.66      
14 A" 854 809 6.03      
15 A" 89 84 0.05      

Unscaled Zero Point Vibrational Energy (zpe) 13271.5 cm-1
Scaled (by 0.9478) Zero Point Vibrational Energy (zpe) 12578.8 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 wB97X-D/3-21G*
ABC
3.43156 0.75317 0.69811

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.020 -0.647 0.000
C2 0.020 0.773 0.000
H3 1.014 -1.154 0.000
H4 -0.467 -1.148 0.865
H5 -0.467 -1.148 -0.865
H6 -0.161 1.347 -0.914
H7 -0.161 1.347 0.914

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7
C11.41981.11601.11161.11162.20072.2007
C21.41982.16842.16172.16171.09431.0943
H31.11602.16841.71491.71492.91082.9108
H41.11162.16171.71491.72973.07882.5135
H51.11162.16171.71491.72972.51353.0788
H62.20071.09432.91083.07882.51351.8276
H72.20071.09432.91082.51353.07881.8276

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 121.636 C1 C2 H7 121.636
C2 C1 H3 117.041 C2 C1 H4 116.773
C2 C1 H5 116.773 H3 C1 H4 100.675
H3 C1 H5 100.675 H4 C1 H5 102.160
H6 C2 H7 113.247
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.671      
2 C -0.401      
3 H 0.222      
4 H 0.221      
5 H 0.221      
6 H 0.204      
7 H 0.204      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.139 -0.221 0.000 0.261
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.042 0.173 0.000
y 0.173 -13.761 0.000
z 0.000 0.000 -13.327
Traceless
 xyz
x -1.498 0.173 0.000
y 0.173 0.423 0.000
z 0.000 0.000 1.075
Polar
3z2-r22.150
x2-y2-1.281
xy0.173
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.128 -0.016 0.000
y -0.016 3.391 0.000
z 0.000 0.000 3.018


<r2> (average value of r2) Å2
<r2> 27.661
(<r2>)1/2 5.259