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: B2PLYP/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 B2PLYP/cc-pVDZ
 hartrees
Energy at 0K-79.054600
Energy at 298.15K-79.058437
HF Energy-78.966423
Nuclear repulsion energy36.765080
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 B2PLYP/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' 3174 3040 13.44      
2 A' 3085 2955 23.93      
3 A' 2993 2867 26.19      
4 A' 1477 1415 1.68      
5 A' 1459 1398 3.48      
6 A' 1392 1334 0.63      
7 A' 1085 1039 0.10      
8 A' 978 936 0.40      
9 A' 458 439 43.92      
10 A" 3284 3145 13.30      
11 A" 3134 3002 19.93      
12 A" 1471 1409 4.16      
13 A" 1194 1143 2.29      
14 A" 808 774 1.99      
15 A" 135 130 0.04      

Unscaled Zero Point Vibrational Energy (zpe) 13064.7 cm-1
Scaled (by 0.9577) Zero Point Vibrational Energy (zpe) 12512.1 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 B2PLYP/cc-pVDZ
ABC
3.40658 0.75399 0.69855

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.013 -0.695 0.000
C2 -0.013 0.796 0.000
H3 1.017 -1.107 0.000
H4 -0.513 -1.104 0.892
H5 -0.513 -1.104 -0.892
H6 0.082 1.354 -0.934
H7 0.082 1.354 0.934

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7
C11.49071.10951.10171.10172.25312.2531
C21.49072.16392.15792.15791.09161.0916
H31.10952.16391.77111.77112.79302.7930
H41.10172.15791.77111.78463.11912.5291
H51.10172.15791.77111.78462.52913.1191
H62.25311.09162.79303.11912.52911.8671
H72.25311.09162.79302.52913.11911.8671

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 120.722 C1 C2 H7 120.722
C2 C1 H3 111.810 C2 C1 H4 111.820
C2 C1 H5 111.820 H3 C1 H4 106.448
H3 C1 H5 106.448 H4 C1 H5 108.179
H6 C2 H7 117.573
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.061      
2 C -0.130      
3 H 0.041      
4 H 0.037      
5 H 0.037      
6 H 0.038      
7 H 0.038      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.140 -0.241 0.000 0.279
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.113 0.187 0.000
y 0.187 -14.367 0.000
z 0.000 0.000 -13.661
Traceless
 xyz
x -1.099 0.187 0.000
y 0.187 0.020 0.000
z 0.000 0.000 1.079
Polar
3z2-r22.157
x2-y2-0.746
xy0.187
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.613 0.002 0.000
y 0.002 3.886 0.000
z 0.000 0.000 3.365


<r2> (average value of r2) Å2
<r2> 27.919
(<r2>)1/2 5.284