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

using model chemistry: MP2/CEP-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/CEP-31G
 hartrees
Energy at 0K-19.806327
Energy at 298.15K-19.810066
HF Energy-19.714519
Nuclear repulsion energy14.621308
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/CEP-31G
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' 3190 3083 23.19      
2 A' 1417 1370 30.66      
3 A' 674 651 19.46      
4 A' 231 223 143.13      
5 A" 3371 3257 7.53      
6 A" 956 924 4.41      

Unscaled Zero Point Vibrational Energy (zpe) 4919.4 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 4753.6 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/CEP-31G
ABC
8.81551 0.34854 0.33551

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.005 1.551 0.000
Br2 -0.005 -0.383 0.000
H3 0.100 2.051 0.970
H4 0.100 2.051 -0.970

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.93471.09561.0956
Br21.93472.62202.6220
H31.09562.62201.9391
H41.09562.62201.9391

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 117.109 Br2 C1 H4 117.109
H3 C1 H4 124.501
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at MP2/CEP-31G
 hartrees
Energy at 0K-19.806311
Energy at 298.15K 
HF Energy-19.714495
Nuclear repulsion energy14.627703
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/CEP-31G
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 3195 3087 22.35 138.16 0.19 0.32
2 A1 1416 1368 31.60 2.98 0.52 0.68
3 A1 675 652 18.33 16.27 0.33 0.50
4 B1 169i 164i 162.66 0.48 0.75 0.86
5 B2 3379 3265 6.19 49.54 0.75 0.86
6 B2 954 922 4.90 9.93 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4724.9 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 4565.6 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/CEP-31G
ABC
8.84778 0.34900 0.33575

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.550
Br2 0.000 0.000 0.383
H3 0.000 0.972 -2.054
H4 0.000 -0.972 -2.054

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.93301.09501.0950
Br21.93302.62352.6235
H31.09502.62351.9445
H41.09502.62351.9445

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 117.388 Br2 C1 H4 117.388
H3 C1 H4 125.223
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability