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All results from a given calculation for CH2Br (bromomethyl radical)

using model chemistry: MP2/3-21G*

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 2A1

Conformer 1 (CS)

Jump to S1C2
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-2599.234469
Energy at 298.15K-2599.238373
HF Energy-2599.032781
Nuclear repulsion energy79.784632
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 MP2/3-21G*
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' 3221 3064 6.06      
2 A' 1483 1411 28.22      
3 A' 719 684 22.57      
4 A' 338 321 72.69      
5 A" 3374 3209 0.11      
6 A" 988 940 1.83      

Unscaled Zero Point Vibrational Energy (zpe) 5061.7 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 4815.2 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 MP2/3-21G*
ABC
9.13397 0.36877 0.35496

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.007 1.506 0.000
Br2 -0.007 -0.373 0.000
H3 0.139 2.001 0.948
H4 0.139 2.001 -0.948

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.87871.07921.0792
Br21.87872.55972.5597
H31.07922.55971.8961
H41.07922.55971.8961

picture of bromomethyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 H3 117.266 Br2 C1 H4 117.266
H3 C1 H4 122.926
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-2599.234399
Energy at 298.15K 
HF Energy-2599.032803
Nuclear repulsion energy79.866230
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 MP2/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3231 3074 4.74 92.25 0.12 0.21
2 A1 1481 1409 30.21 3.52 0.62 0.76
3 A1 722 687 20.79 6.35 0.26 0.41
4 B1 247i 235i 88.89 1.04 0.75 0.86
5 B2 3388 3223 0.00 49.71 0.75 0.86
6 B2 981 934 2.07 4.84 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4777.7 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 4545.0 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 MP2/3-21G*
ABC
9.22726 0.36957 0.35534

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.503
Br2 0.000 0.000 0.372
H3 0.000 0.952 -2.009
H4 0.000 -0.952 -2.009

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.87541.07811.0781
Br21.87542.56462.5646
H31.07812.56461.9041
H41.07812.56461.9041

picture of bromomethyl radical state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 H3 117.984 Br2 C1 H4 117.984
H3 C1 H4 124.033
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability