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

using model chemistry: MP2=FULL/STO-3G

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/STO-3G
 hartrees
Energy at 0K-2583.222587
Energy at 298.15K-2583.226700
HF Energy-2583.174741
Nuclear repulsion energy79.736875
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/STO-3G
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' 3438 3056 0.50      
2 A' 1604 1426 34.05      
3 A' 820 729 16.33      
4 A' 643 572 11.86      
5 A" 3616 3214 0.66      
6 A" 1051 934 1.99      

Unscaled Zero Point Vibrational Energy (zpe) 5585.9 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 4965.3 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 MP2=FULL/STO-3G
ABC
8.90885 0.36874 0.35587

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.013 1.503 0.000
Br2 -0.013 -0.372 0.000
H3 0.262 2.006 0.938
H4 0.262 2.006 -0.938

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.87491.09931.0993
Br21.87492.57132.5713
H31.09932.57131.8755
H41.09932.57131.8755

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 117.261 Br2 C1 H4 117.261
H3 C1 H4 117.082
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at MP2=FULL/STO-3G
 hartrees
Energy at 0K-2583.221618
Energy at 298.15K 
HF Energy-2583.174307
Nuclear repulsion energy79.878631
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/STO-3G
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 3466 3081 0.04 37.11 0.12 0.22
2 A1 1590 1414 43.22 8.71 0.75 0.86
3 A1 824 732 14.80 6.90 0.34 0.51
4 B1 499i 443i 29.90 0.94 0.75 0.86
5 B2 3652 3246 0.02 26.31 0.75 0.86
6 B2 1015 903 1.87 4.86 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5024.1 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 4466.0 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/STO-3G
ABC
9.26918 0.36995 0.35575

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.494
Br2 0.000 0.000 0.373
H3 0.000 0.950 -2.040
H4 0.000 -0.950 -2.040

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.86721.09531.0953
Br21.86722.59282.5928
H31.09532.59281.8998
H41.09532.59281.8998

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 119.858 Br2 C1 H4 119.858
H3 C1 H4 120.283
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability