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All results from a given calculation for C2H5 (Ethyl radical)

using model chemistry: QCISD/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 QCISD/6-31G**
 hartrees
Energy at 0K-78.910047
Energy at 298.15K-78.913942
HF Energy-78.605404
Nuclear repulsion energy36.925435
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 QCISD/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' 3225 3036 15.07      
2 A' 3139 2955 29.69      
3 A' 3057 2878 28.14      
4 A' 1543 1453 2.29      
5 A' 1531 1441 2.47      
6 A' 1461 1376 0.07      
7 A' 1093 1029 0.07      
8 A' 1024 964 0.22      
9 A' 461 434 44.76      
10 A" 3331 3136 19.69      
11 A" 3183 2996 25.59      
12 A" 1547 1457 2.86      
13 A" 1238 1166 1.89      
14 A" 831 782 0.96      
15 A" 157 148 0.32      

Unscaled Zero Point Vibrational Energy (zpe) 13410.9 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 12625.0 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 QCISD/6-31G**
ABC
3.46686 0.75500 0.70099

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.013 -0.697 0.000
C2 -0.013 0.797 0.000
H3 1.005 -1.106 0.000
H4 -0.516 -1.095 0.883
H5 -0.516 -1.095 -0.883
H6 0.093 1.348 -0.923
H7 0.093 1.348 0.923

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7
C11.49401.09751.09111.09112.24652.2465
C21.49402.15862.14732.14731.08071.0807
H31.09752.15861.75841.75842.77652.7765
H41.09112.14731.75841.76663.09882.5179
H51.09112.14731.75841.76662.51793.0988
H62.24651.08072.77653.09882.51791.8469
H72.24651.08072.77652.51793.09881.8469

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 120.663 C1 C2 H7 120.663
C2 C1 H3 111.899 C2 C1 H4 111.375
C2 C1 H5 111.375 H3 C1 H4 106.923
H3 C1 H5 106.923 H4 C1 H5 108.101
H6 C2 H7 117.411
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability