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: CCSD/cc-pVTZ

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 CCSD/cc-pVTZ
 hartrees
Energy at 0K-958.005502
Energy at 298.15K 
HF Energy-957.447866
Nuclear repulsion energy125.858337
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/cc-pVTZ
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 3296 3102 0.16      
2 A1 764 719 8.27      
3 A1 312 294 0.45      
4 B1 380i 358i 38.92      
5 B2 1262 1188 55.87      
6 B2 948 892 121.15      

Unscaled Zero Point Vibrational Energy (zpe) 3100.9 cm-1
Scaled (by 0.9412) Zero Point Vibrational Energy (zpe) 2918.6 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/cc-pVTZ
ABC
1.60619 0.11099 0.10382

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.674
H2 0.000 0.000 1.747
Cl3 0.000 1.474 -0.170
Cl4 0.000 -1.474 -0.170

Atom - Atom Distances (Å)
  C1 H2 Cl3 Cl4
C11.07331.69811.6981
H21.07332.41812.4181
Cl31.69812.41812.9473
Cl41.69812.41812.9473

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 119.795 Cl3 C1 Cl4 120.409
Cl4 C1 H2 119.795
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at CCSD/cc-pVTZ
 hartrees
Energy at 0K-958.006305
Energy at 298.15K-958.007128
HF Energy-957.449425
Nuclear repulsion energy125.726866
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/cc-pVTZ
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' 3258 3066 0.94      
2 A' 771 726 12.86      
3 A' 497 468 21.20      
4 A' 306 288 0.61      
5 A" 1263 1189 45.69      
6 A" 921 867 142.13      

Unscaled Zero Point Vibrational Energy (zpe) 3508.3 cm-1
Scaled (by 0.9412) Zero Point Vibrational Energy (zpe) 3302.0 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 CCSD/cc-pVTZ
ABC
1.55547 0.11146 0.10422

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.012 0.696 0.000
H2 -0.469 1.659 0.000
Cl3 0.012 -0.172 1.470
Cl4 0.012 -0.172 -1.470

Atom - Atom Distances (Å)
  C1 H2 Cl3 Cl4
C11.07651.70691.7069
H21.07652.39672.3967
Cl31.70692.39672.9395
Cl41.70692.39672.9395

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 117.062 Cl3 C1 Cl4 118.871
Cl4 C1 H2 117.062
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability