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: MP2=FULL/cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at MP2=FULL/cc-pVQZ
 hartrees
Energy at 0K-79.040940
Energy at 298.15K-79.044803
HF Energy-78.633325
Nuclear repulsion energy37.221510
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 MP2=FULL/cc-pVQZ
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' 3230 3092 11.07      
2 A' 3134 2999 14.35      
3 A' 3049 2918 18.00      
4 A' 1513 1448 1.62      
5 A' 1497 1433 4.73      
6 A' 1417 1356 1.90      
7 A' 1098 1051 0.05      
8 A' 996 953 0.51      
9 A' 483 462 54.63      
10 A" 3341 3197 6.78      
11 A" 3181 3045 13.20      
12 A" 1509 1444 5.72      
13 A" 1214 1162 2.09      
14 A" 823 788 1.74      
15 A" 129 124 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 13306.9 cm-1
Scaled (by 0.9571) Zero Point Vibrational Energy (zpe) 12736.0 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 MP2=FULL/cc-pVQZ
ABC
3.51441 0.76912 0.71324

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/cc-pVQZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.011 -0.690 0.000
C2 -0.011 0.789 0.000
H3 1.004 -1.092 0.000
H4 -0.505 -1.090 0.879
H5 -0.505 -1.090 -0.879
H6 0.069 1.339 -0.919
H7 0.069 1.339 0.919

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7
C11.47871.09151.08481.08482.22812.2281
C21.47872.13732.13252.13251.07341.0734
H31.09152.13731.74611.74612.76172.7617
H41.08482.13251.74611.75743.07552.4960
H51.08482.13251.74611.75742.49603.0755
H62.22811.07342.76173.07552.49601.8371
H72.22811.07342.76172.49603.07551.8371

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 120.805 C1 C2 H7 120.805
C2 C1 H3 111.632 C2 C1 H4 111.660
C2 C1 H5 111.660 H3 C1 H4 106.706
H3 C1 H5 106.706 H4 C1 H5 108.201
H6 C2 H7 117.679
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability