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(T)/cc-pVDZ

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(T)/cc-pVDZ
 hartrees
Energy at 0K-957.834644
Energy at 298.15K 
HF Energy-957.402187
Nuclear repulsion energy124.506314
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(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 A1 3273 3203        
2 A1 752 736        
3 A1 308 301        
4 B1 441i 432i        
5 B2 1234 1208        
6 B2 936 917        

Unscaled Zero Point Vibrational Energy (zpe) 3030.8 cm-1
Scaled (by 0.9788) Zero Point Vibrational Energy (zpe) 2966.5 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 CCSD(T)/cc-pVDZ
ABC
1.57052 0.10865 0.10162

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.680
H2 0.000 0.000 1.772
Cl3 0.000 1.489 -0.172
Cl4 0.000 -1.489 -0.172

Atom - Atom Distances (Å)
  C1 H2 Cl3 Cl4
C11.09141.71611.7161
H21.09142.44882.4488
Cl31.71612.44882.9789
Cl41.71612.44882.9789

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 119.778 Cl3 C1 Cl4 120.443
Cl4 C1 H2 119.778
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1
Energy calculated at CCSD(T)/cc-pVDZ
 hartrees
Energy at 0K-957.836068
Energy at 298.15K-957.836914
HF Energy-957.404178
Nuclear repulsion energy124.349869
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(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' 3224 3155        
2 A' 761 744        
3 A' 554 543        
4 A' 303 296        
5 A" 1238 1211        
6 A" 901 882        

Unscaled Zero Point Vibrational Energy (zpe) 3489.6 cm-1
Scaled (by 0.9788) Zero Point Vibrational Energy (zpe) 3415.7 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(T)/cc-pVDZ
ABC
1.50940 0.10924 0.10214

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.013 0.709 0.000
H2 -0.538 1.656 0.000
Cl3 0.013 -0.174 1.484
Cl4 0.013 -0.174 -1.484

Atom - Atom Distances (Å)
  C1 H2 Cl3 Cl4
C11.09561.72721.7272
H21.09562.41992.4199
Cl31.72722.41992.9688
Cl41.72722.41992.9688

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 116.224 Cl3 C1 Cl4 118.505
Cl4 C1 H2 116.224
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability