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

using model chemistry: CCD/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 CCD/3-21G*
 hartrees
Energy at 0K-2599.255761
Energy at 298.15K-2599.259494
HF Energy-2599.032643
Nuclear repulsion energy79.504461
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 CCD/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' 3175 3037 5.81      
2 A' 1457 1394 27.23      
3 A' 705 675 17.04      
4 A' 213 203 76.08      
5 A" 3322 3178 0.38      
6 A" 966 924 1.78      

Unscaled Zero Point Vibrational Energy (zpe) 4918.9 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 4704.9 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 CCD/3-21G*
ABC
9.13259 0.36615 0.35224

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.004 1.510 0.000
Br2 -0.004 -0.374 0.000
H3 0.091 2.015 0.953
H4 0.091 2.015 -0.953

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.88451.08271.0827
Br21.88452.57382.5738
H31.08272.57381.9064
H41.08272.57381.9064

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 117.769 Br2 C1 H4 117.769
H3 C1 H4 123.392
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at CCD/3-21G*
 hartrees
Energy at 0K-2599.255750
Energy at 298.15K 
HF Energy-2599.032635
Nuclear repulsion energy79.523784
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 CCD/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 3179 3041 5.30      
2 A1 1456 1392 28.08      
3 A1 706 675 16.43      
4 B1 154i 147i 82.69      
5 B2 3329 3184 0.23      
6 B2 963 921 1.87      

Unscaled Zero Point Vibrational Energy (zpe) 4739.0 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 4532.8 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 CCD/3-21G*
ABC
9.16995 0.36633 0.35226

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.509
Br2 0.000 0.000 0.374
H3 0.000 0.955 -2.018
H4 0.000 -0.955 -2.018

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.88351.08221.0822
Br21.88352.57612.5761
H31.08222.57611.9100
H41.08222.57611.9100

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 118.057 Br2 C1 H4 118.057
H3 C1 H4 123.887
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability