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: B3LYPultrafine/aug-cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at B3LYPultrafine/aug-cc-pVTZ
 hartrees
Energy at 0K-79.193145
Energy at 298.15K-79.196959
HF Energy-79.193145
Nuclear repulsion energy37.024220
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 B3LYPultrafine/aug-cc-pVTZ
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' 3143 3041 14.44      
2 A' 3034 2936 21.52      
3 A' 2943 2848 26.23      
4 A' 1482 1434 2.76      
5 A' 1467 1419 2.83      
6 A' 1401 1355 1.70      
7 A' 1061 1026 0.07      
8 A' 982 950 0.67      
9 A' 495 478 55.39      
10 A" 3239 3134 13.39      
11 A" 3077 2977 19.83      
12 A" 1480 1432 5.61      
13 A" 1195 1156 2.12      
14 A" 813 786 1.59      
15 A" 103 100 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 12956.5 cm-1
Scaled (by 0.9675) Zero Point Vibrational Energy (zpe) 12535.4 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 B3LYPultrafine/aug-cc-pVTZ
ABC
3.47806 0.76201 0.70611

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/aug-cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.009 -0.692 0.000
C2 -0.009 0.792 0.000
H3 1.012 -1.101 0.000
H4 -0.503 -1.098 0.885
H5 -0.503 -1.098 -0.885
H6 0.051 1.348 -0.924
H7 0.051 1.348 0.924

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7
C11.48371.10011.09171.09172.24032.2403
C21.48372.15102.14482.14481.08031.0803
H31.10012.15101.75421.75422.78882.7888
H41.09172.14481.75421.76933.09272.5088
H51.09172.14481.75421.76932.50883.0927
H62.24031.08032.78883.09272.50881.8484
H72.24031.08032.78882.50883.09271.8484

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 120.988 C1 C2 H7 120.988
C2 C1 H3 111.853 C2 C1 H4 111.876
C2 C1 H5 111.876 H3 C1 H4 106.323
H3 C1 H5 106.323 H4 C1 H5 108.259
H6 C2 H7 117.624
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/aug-cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.481      
2 C -0.766      
3 H 0.207      
4 H 0.199      
5 H 0.199      
6 H 0.321      
7 H 0.321      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.115 -0.302 0.000 0.323
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -15.479 0.155 0.000
y 0.155 -14.630 0.000
z 0.000 0.000 -13.797
Traceless
 xyz
x -1.266 0.155 0.000
y 0.155 0.009 0.000
z 0.000 0.000 1.257
Polar
3z2-r22.515
x2-y2-0.850
xy0.155
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.969 -0.072 0.000
y -0.072 4.843 0.000
z 0.000 0.000 4.001


<r2> (average value of r2) Å2
<r2> 27.846
(<r2>)1/2 5.277