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

using model chemistry: HF/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 HF/STO-3G
 hartrees
Energy at 0K-2583.175185
Energy at 298.15K-2583.179278
HF Energy-2583.175185
Nuclear repulsion energy80.205836
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 HF/STO-3G
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' 3606 2944 0.38      
2 A' 1671 1365 43.37      
3 A' 846 690 16.39      
4 A' 581 475 13.73      
5 A" 3793 3097 0.06      
6 A" 1087 887 2.40      

Unscaled Zero Point Vibrational Energy (zpe) 5791.7 cm-1
Scaled (by 0.8165) Zero Point Vibrational Energy (zpe) 4728.9 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 HF/STO-3G
ABC
9.21236 0.37257 0.35941

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.011 1.495 0.000
Br2 -0.011 -0.371 0.000
H3 0.223 2.000 0.930
H4 0.223 2.000 -0.930

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.86521.08411.0841
Br21.86522.55752.5575
H31.08412.55751.8601
H41.08412.55751.8601

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 117.805 Br2 C1 H4 117.805
H3 C1 H4 118.156
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.152      
2 Br -0.001      
3 H 0.077      
4 H 0.077      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.239 1.242 0.000 1.265
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.072 0.449 0.000
y 0.449 -21.018 0.000
z 0.000 0.000 -22.336
Traceless
 xyz
x -1.394 0.449 0.000
y 0.449 1.685 0.000
z 0.000 0.000 -0.291
Polar
3z2-r2-0.582
x2-y2-2.053
xy0.449
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.375 0.125 0.000
y 0.125 2.636 0.000
z 0.000 0.000 0.886


<r2> (average value of r2) Å2
<r2> 41.875
(<r2>)1/2 6.471

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at HF/STO-3G
 hartrees
Energy at 0K-2583.174640
Energy at 298.15K 
HF Energy-2583.174640
Nuclear repulsion energy80.292064
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 HF/STO-3G
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 3616 2952 0.53 40.93 0.12 0.22
2 A1 1658 1354 52.16 8.84 0.75 0.86
3 A1 847 691 14.47 10.50 0.34 0.51
4 B1 434i 355i 27.05 1.51 0.75 0.86
5 B2 3811 3112 0.57 28.94 0.75 0.86
6 B2 1058 864 2.35 5.06 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5277.5 cm-1
Scaled (by 0.8165) Zero Point Vibrational Energy (zpe) 4309.1 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 HF/STO-3G
ABC
9.47387 0.37334 0.35919

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.489
Br2 0.000 0.000 0.371
H3 0.000 0.940 -2.025
H4 0.000 -0.940 -2.025

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.85991.08191.0819
Br21.85992.57402.5740
H31.08192.57401.8791
H41.08192.57401.8791

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 119.726 Br2 C1 H4 119.726
H3 C1 H4 120.548
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.164      
2 Br 0.006      
3 H 0.079      
4 H 0.079      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -1.228 1.228
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.146 0.000 0.000
y 0.000 -22.264 0.000
z 0.000 0.000 -20.910
Traceless
 xyz
x -1.559 0.000 0.000
y 0.000 -0.236 0.000
z 0.000 0.000 1.795
Polar
3z2-r23.590
x2-y2-0.883
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.354 0.000 0.000
y 0.000 0.885 0.000
z 0.000 0.000 2.616


<r2> (average value of r2) Å2
<r2> 41.895
(<r2>)1/2 6.473