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/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 PBEPBE/cc-pVDZ
 hartrees
Energy at 0K-79.033898
Energy at 298.15K-79.037666
HF Energy-79.033898
Nuclear repulsion energy36.635508
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/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' 3080 3062 13.97      
2 A' 2985 2967 21.14      
3 A' 2881 2864 26.36      
4 A' 1408 1400 1.69      
5 A' 1387 1379 3.36      
6 A' 1320 1312 1.47      
7 A' 1069 1063 0.28      
8 A' 927 921 0.85      
9 A' 462 459 44.17      
10 A" 3188 3169 12.74      
11 A" 3039 3021 16.33      
12 A" 1400 1392 4.39      
13 A" 1137 1130 2.78      
14 A" 779 774 3.16      
15 A" 118 118 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 12588.3 cm-1
Scaled (by 0.9942) Zero Point Vibrational Energy (zpe) 12515.3 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/cc-pVDZ
ABC
3.36390 0.75284 0.69627

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.012 -0.692 0.000
C2 -0.012 0.795 0.000
H3 1.026 -1.113 0.000
H4 -0.510 -1.112 0.899
H5 -0.510 -1.112 -0.899
H6 0.067 1.360 -0.941
H7 0.067 1.360 0.941

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7
C11.48751.11991.11041.11042.25912.2591
C21.48752.17252.16632.16631.10041.1004
H31.11992.17251.78011.78012.81472.8147
H41.11042.16631.78011.79873.13512.5384
H51.11042.16631.78011.79872.53843.1351
H62.25911.10042.81473.13512.53841.8821
H72.25911.10042.81472.53843.13511.8821

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 120.879 C1 C2 H7 120.879
C2 C1 H3 112.088 C2 C1 H4 112.180
C2 C1 H5 112.180 H3 C1 H4 105.905
H3 C1 H5 105.905 H4 C1 H5 108.172
H6 C2 H7 117.572
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.081      
2 C -0.134      
3 H 0.050      
4 H 0.044      
5 H 0.044      
6 H 0.039      
7 H 0.039      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.128 -0.301 0.000 0.327
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.076 0.147 0.000
y 0.147 -14.208 0.000
z 0.000 0.000 -13.581
Traceless
 xyz
x -1.182 0.147 0.000
y 0.147 0.120 0.000
z 0.000 0.000 1.061
Polar
3z2-r22.123
x2-y2-0.868
xy0.147
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.690 -0.027 0.000
y -0.027 4.173 0.000
z 0.000 0.000 3.478


<r2> (average value of r2) Å2
<r2> 27.977
(<r2>)1/2 5.289