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=FULLultrafine/6-31G

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=FULLultrafine/6-31G
 hartrees
Energy at 0K-78.997704
Energy at 298.15K 
HF Energy-78.941967
Nuclear repulsion energy36.801811
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=FULLultrafine/6-31G
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' 3191 3191 16.85      
2 A' 3084 3084 31.37      
3 A' 2997 2997 30.88      
4 A' 1545 1545 6.07      
5 A' 1524 1524 0.82      
6 A' 1478 1478 2.90      
7 A' 1085 1085 0.07      
8 A' 1036 1036 0.86      
9 A' 492 492 62.00      
10 A" 3298 3298 24.26      
11 A" 3130 3130 27.03      
12 A" 1554 1554 5.42      
13 A" 1244 1244 2.96      
14 A" 849 849 3.19      
15 A" 115 115 0.10      

Unscaled Zero Point Vibrational Energy (zpe) 13310.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 13310.9 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=FULLultrafine/6-31G
ABC
3.44951 0.75038 0.69623

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.009 -0.698 0.000
C2 -0.009 0.799 0.000
H3 1.013 -1.113 0.000
H4 -0.512 -1.102 0.887
H5 -0.512 -1.102 -0.887
H6 0.062 1.356 -0.927
H7 0.062 1.356 0.927

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7
C11.49681.10351.09601.09602.25512.2551
C21.49682.16802.15642.15641.08421.0842
H31.10352.16801.76381.76382.80402.8040
H41.09602.15641.76381.77343.10812.5244
H51.09602.15641.76381.77342.52443.1081
H62.25511.08422.80403.10812.52441.8541
H72.25511.08422.80402.52443.10811.8541

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 120.954 C1 C2 H7 120.954
C2 C1 H3 112.081 C2 C1 H4 111.611
C2 C1 H5 111.611 H3 C1 H4 106.620
H3 C1 H5 106.620 H4 C1 H5 108.000
H6 C2 H7 117.536
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability