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 CHCl2 (dichloromethyl radical)

using model chemistry: MP2/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no C2V 2B1
1 2 yes CS 2A'

Conformer 1 (C2V)

Jump to S1C2
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-957.855596
Energy at 298.15K 
HF Energy-957.371435
Nuclear repulsion energy126.479543
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 MP2/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3347 3161 2.09      
2 A1 783 740 9.28      
3 A1 317 300 0.48      
4 B1 452i 427i 39.71      
5 B2 1262 1192 56.46      
6 B2 968 914 140.41      

Unscaled Zero Point Vibrational Energy (zpe) 3112.6 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 2939.8 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 MP2/6-31G(2df,p)
ABC
1.61048 0.11228 0.10497

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.672
H2 0.000 0.000 1.747
Cl3 0.000 1.465 -0.170
Cl4 0.000 -1.465 -0.170

Atom - Atom Distances (Å)
  C1 H2 Cl3 Cl4
C11.07511.68991.6899
H21.07512.41302.4130
Cl31.68992.41302.9303
Cl41.68992.41302.9303

picture of dichloromethyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Cl3 C1 H2 119.889 Cl3 C1 Cl4 120.223
Cl4 C1 H2 119.889
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-957.856968
Energy at 298.15K-957.857847
HF Energy-957.373110
Nuclear repulsion energy126.208010
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 MP2/6-31G(2df,p)
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' 3292 3109 1.83      
2 A' 794 750 16.26      
3 A' 563 532 17.35      
4 A' 312 294 0.36      
5 A" 1266 1196 45.74      
6 A" 929 878 168.01      

Unscaled Zero Point Vibrational Energy (zpe) 3578.0 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 3379.4 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 MP2/6-31G(2df,p)
ABC
1.54531 0.11268 0.10530

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.013 0.701 0.000
H2 -0.520 1.640 0.000
Cl3 0.013 -0.172 1.462
Cl4 0.013 -0.172 -1.462

Atom - Atom Distances (Å)
  C1 H2 Cl3 Cl4
C11.07991.70231.7023
H21.07992.38822.3882
Cl31.70232.38822.9231
Cl41.70232.38822.9231

picture of dichloromethyl radical state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Cl3 C1 H2 116.480 Cl3 C1 Cl4 118.312
Cl4 C1 H2 116.480
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability