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

using model chemistry: QCISD(T)/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 QCISD(T)/cc-pVDZ
 hartrees
Energy at 0K-78.916702
Energy at 298.15K-78.920557
HF Energy-78.603471
Nuclear repulsion energy36.543964
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(T)/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' 3155 3007        
2 A' 3079 2934        
3 A' 2992 2852        
4 A' 1479 1409        
5 A' 1463 1394        
6 A' 1392 1326        
7 A' 1076 1026        
8 A' 980 934        
9 A' 447 426        
10 A" 3262 3109        
11 A" 3125 2979        
12 A" 1474 1405        
13 A" 1190 1134        
14 A" 800 763        
15 A" 155 148        

Unscaled Zero Point Vibrational Energy (zpe) 13033.3 cm-1
Scaled (by 0.9531) Zero Point Vibrational Energy (zpe) 12422.0 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(T)/cc-pVDZ
ABC
3.36517 0.74396 0.68976

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.014 -0.701 0.000
C2 -0.014 0.802 0.000
H3 1.020 -1.113 0.000
H4 -0.521 -1.106 0.897
H5 -0.521 -1.106 -0.897
H6 0.097 1.360 -0.938
H7 0.097 1.360 0.938

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7
C11.50271.11351.10671.10672.26712.2671
C21.50272.17672.16812.16811.09741.0974
H31.11352.17671.78271.78272.80192.8019
H41.10672.16811.78271.79313.13532.5426
H51.10672.16811.78271.79312.54263.1353
H62.26711.09742.80193.13532.54261.8767
H72.26711.09742.80192.54263.13531.8767

picture of Ethyl radical state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability