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: CCSD=FULL/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 CCSD=FULL/cc-pVDZ
 hartrees
Energy at 0K-78.913948
Energy at 298.15K-78.917799
HF Energy-78.603689
Nuclear repulsion energy36.611743
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 CCSD=FULL/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' 3176 3176 12.67      
2 A' 3102 3102 25.38      
3 A' 3019 3019 26.99      
4 A' 1490 1490 1.52      
5 A' 1474 1474 3.34      
6 A' 1406 1406 0.17      
7 A' 1085 1085 0.05      
8 A' 989 989 0.19      
9 A' 446 446 42.87      
10 A" 3283 3283 14.11      
11 A" 3147 3147 21.15      
12 A" 1486 1486 3.75      
13 A" 1199 1199 1.92      
14 A" 807 807 1.21      
15 A" 147 147 0.14      

Unscaled Zero Point Vibrational Energy (zpe) 13127.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 13127.6 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 CCSD=FULL/cc-pVDZ
ABC
3.38086 0.74634 0.69200

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.014 -0.700 0.000
C2 -0.014 0.800 0.000
H3 1.018 -1.111 0.000
H4 -0.520 -1.104 0.894
H5 -0.520 -1.104 -0.894
H6 0.092 1.358 -0.936
H7 0.092 1.358 0.936

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 H6 H7
C11.50041.11061.10421.10422.26382.2638
C21.50042.17222.16432.16431.09521.0952
H31.11062.17221.77891.77892.79852.7985
H41.10422.16431.77891.78863.12912.5379
H51.10422.16431.77891.78862.53793.1291
H62.26381.09522.79853.12912.53791.8730
H72.26381.09522.79852.53793.12911.8730

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 120.620 C1 C2 H7 120.620
C2 C1 H3 111.728 C2 C1 H4 111.480
C2 C1 H5 111.480 H3 C1 H4 106.867
H3 C1 H5 106.867 H4 C1 H5 108.169
H6 C2 H7 117.540
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability