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

using model chemistry: MP2=FULL/6-31G**

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 2A1

Conformer 1 (CS)

Jump to S1C2
Energy calculated at MP2=FULL/6-31G**
 hartrees
Energy at 0K-2609.133411
Energy at 298.15K-2609.137407
HF Energy-2608.870813
Nuclear repulsion energy80.566506
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=FULL/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3285 3070 7.18      
2 A' 1466 1370 27.39      
3 A' 716 669 22.17      
4 A' 433 405 53.80      
5 A" 3444 3218 0.03      
6 A" 980 916 0.99      

Unscaled Zero Point Vibrational Energy (zpe) 5161.8 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 4823.2 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=FULL/6-31G**
ABC
9.15899 0.37642 0.36241

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.009 1.492 0.000
Br2 -0.009 -0.369 0.000
H3 0.176 1.974 0.941
H4 0.176 1.974 -0.941

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.86021.07381.0738
Br21.86022.53152.5315
H31.07382.53151.8827
H41.07382.53151.8827

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 116.695 Br2 C1 H4 116.695
H3 C1 H4 122.481
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at MP2=FULL/6-31G**
 hartrees
Energy at 0K-2609.133226
Energy at 298.15K 
HF Energy-2608.870558
Nuclear repulsion energy80.692178
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=FULL/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3301 3085 4.69 100.81 0.12 0.21
2 A1 1465 1369 29.73 2.40 0.66 0.80
3 A1 720 673 19.53 6.50 0.22 0.35
4 B1 320i 299i 72.31 0.70 0.75 0.86
5 B2 3465 3238 0.49 52.15 0.75 0.86
6 B2 967 904 1.18 3.89 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4799.9 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 4485.0 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=FULL/6-31G**
ABC
9.31355 0.37766 0.36295

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.487
Br2 0.000 0.000 0.368
H3 0.000 0.948 -1.988
H4 0.000 -0.948 -1.988

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.85501.07221.0722
Br21.85502.54002.5400
H31.07222.54001.8952
H41.07222.54001.8952

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 117.892 Br2 C1 H4 117.892
H3 C1 H4 124.217
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability