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

using model chemistry: CID/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 CID/3-21G*
 hartrees
Energy at 0K-2599.240555
Energy at 298.15K-2599.244306
HF Energy-2599.032792
Nuclear repulsion energy79.672963
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 CID/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 2997 5.78      
2 A' 1474 1371 28.75      
3 A' 713 664 17.70      
4 A' 221 206 76.96      
5 A" 3370 3136 0.21      
6 A" 977 909 1.82      

Unscaled Zero Point Vibrational Energy (zpe) 4987.7 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 4641.1 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 CID/3-21G*
ABC
9.19098 0.36761 0.35369

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.005 1.508 0.000
Br2 -0.005 -0.373 0.000
H3 0.093 2.010 0.950
H4 0.093 2.010 -0.950

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.88101.07891.0789
Br21.88102.56732.5673
H31.07892.56731.9000
H41.07892.56731.9000

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 117.733 Br2 C1 H4 117.733
H3 C1 H4 123.412
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at CID/3-21G*
 hartrees
Energy at 0K-2599.240542
Energy at 298.15K 
HF Energy-2599.032784
Nuclear repulsion energy79.697461
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 CID/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 3225 3001 5.23      
2 A1 1472 1370 29.70      
3 A1 714 664 17.03      
4 B1 159i 148i 83.97      
5 B2 3377 3142 0.10      
6 B2 973 906 1.92      

Unscaled Zero Point Vibrational Energy (zpe) 4801.0 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 4467.3 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 CID/3-21G*
ABC
9.23197 0.36784 0.35375

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.507
Br2 0.000 0.000 0.373
H3 0.000 0.952 -2.014
H4 0.000 -0.952 -2.014

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.87981.07841.0784
Br21.87982.56962.5696
H31.07842.56961.9036
H41.07842.56961.9036

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 118.045 Br2 C1 H4 118.045
H3 C1 H4 123.910
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability