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 CH2Cl (chloromethyl radical)

using model chemistry: MP2/CEP-31G*

19 10 17 12 22

States and conformations

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

Conformer 1 (CS)

Jump to S1C2
Energy calculated at MP2/CEP-31G*
 hartrees
Energy at 0K-21.519774
Energy at 298.15K 
HF Energy-21.287486
Nuclear repulsion energy15.789987
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/CEP-31G*
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' 3227 3064 21.06      
2 A' 1458 1384 16.41      
3 A' 865 821 45.68      
4 A' 457 434 92.29      
5 A" 3385 3214 5.96      
6 A" 1033 981 0.10      

Unscaled Zero Point Vibrational Energy (zpe) 5212.6 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 4948.9 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/CEP-31G*
ABC
8.83682 0.51339 0.48685

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.015 1.137 0.000
Cl2 -0.015 -0.592 0.000
H3 0.178 1.622 0.958
H4 0.178 1.622 -0.958

Atom - Atom Distances (Å)
  C1 Cl2 H3 H4
C11.72851.09101.0910
Cl21.72852.42002.4200
H31.09102.42001.9155
H41.09102.42001.9155

picture of chloromethyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 H3 116.425 Br2 C1 H4 116.425
H3 C1 H4 122.760
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at MP2/CEP-31G*
 hartrees
Energy at 0K-21.519546
Energy at 298.15K 
HF Energy-21.287036
Nuclear repulsion energy15.803525
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/CEP-31G*
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 3242 3078 17.16      
2 A1 1458 1384 17.27      
3 A1 872 828 42.36      
4 B1 341i 323i 140.41      
5 B2 3408 3236 2.97      
6 B2 1021 970 0.29      

Unscaled Zero Point Vibrational Energy (zpe) 4830.3 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 4585.8 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/CEP-31G*
ABC
8.97640 0.51481 0.48688

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.132
Cl2 0.000 0.000 0.592
H3 0.000 0.965 -1.637
H4 0.000 -0.965 -1.637

Atom - Atom Distances (Å)
  C1 Cl2 H3 H4
C11.72431.08931.0893
Cl21.72432.42912.4291
H31.08932.42911.9305
H41.08932.42911.9305

picture of chloromethyl radical state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 H3 117.607 Br2 C1 H4 117.607
H3 C1 H4 124.785
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability