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 CH2CH2Cl (2-chloroethyl radical)

using model chemistry: CISD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at CISD/3-21G*
 hartrees
Energy at 0K-535.286915
Energy at 298.15K-535.290551
HF Energy-534.986759
Nuclear repulsion energy93.228608
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 CISD/3-21G*
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' 3214 3003 4.27      
2 A' 3174 2966 10.56      
3 A' 1587 1483 4.45      
4 A' 1550 1448 1.77      
5 A' 1339 1251 14.15      
6 A' 1058 988 6.17      
7 A' 659 615 103.39      
8 A' 567 529 10.37      
9 A' 322 301 12.12      
10 A" 3323 3105 6.02      
11 A" 3233 3021 1.95      
12 A" 1337 1250 0.13      
13 A" 1121 1047 0.68      
14 A" 824 770 2.98      
15 A" 226 211 1.64      

Unscaled Zero Point Vibrational Energy (zpe) 11766.4 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 10994.5 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 CISD/3-21G*
ABC
1.07151 0.18738 0.17029

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.485 0.822 0.000
C2 0.000 0.883 0.000
Cl3 0.714 -0.840 0.000
H4 -2.018 0.674 0.930
H5 -2.018 0.674 -0.930
H6 0.403 1.354 -0.893
H7 0.403 1.354 0.893

Atom - Atom Distances (Å)
  C1 C2 Cl3 H4 H5 H6 H7
C11.48642.75711.08171.08172.15522.1552
C21.48641.86522.23142.23141.08711.0871
Cl32.75711.86523.25913.25912.38932.3893
H41.08172.23143.25911.85963.10542.5143
H51.08172.23143.25911.85962.51433.1054
H62.15521.08712.38933.10542.51431.7863
H72.15521.08712.38932.51433.10541.7863

picture of 2-chloroethyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Cl3 110.182 C1 C2 H6 112.821
C1 C2 H7 112.821 C2 C1 H4 119.830
C2 C1 H5 119.830 Cl3 C2 H6 104.971
Cl3 C2 H7 104.971 H4 C1 H5 118.547
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability