return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: HF/6-31G

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 HF/6-31G
 hartrees
Energy at 0K-2608.721119
Energy at 298.15K-2608.724804
HF Energy-2608.721119
Nuclear repulsion energy78.610123
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/6-31G
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' 3361 3034 5.62      
2 A' 1481 1337 51.50      
3 A' 642 579 23.42      
4 A' 198 178 94.07      
5 A" 3537 3194 0.00      
6 A" 982 886 0.82      

Unscaled Zero Point Vibrational Energy (zpe) 5100.0 cm-1
Scaled (by 0.9029) Zero Point Vibrational Energy (zpe) 4604.8 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 HF/6-31G
ABC
9.25350 0.35640 0.34334

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.004 1.537 0.000
Br2 -0.004 -0.379 0.000
H3 0.080 2.019 0.948
H4 0.080 2.019 -0.948

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.91541.06681.0668
Br21.91542.57962.5796
H31.06682.57961.8955
H41.06682.57961.8955

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 116.884 Br2 C1 H4 116.884
H3 C1 H4 125.356
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.486      
2 Br 0.043      
3 H 0.221      
4 H 0.221      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.176 1.759 0.000 1.768
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.503 0.347 0.000
y 0.347 -21.677 0.000
z 0.000 0.000 -24.476
Traceless
 xyz
x -3.427 0.347 0.000
y 0.347 3.812 0.000
z 0.000 0.000 -0.385
Polar
3z2-r2-0.771
x2-y2-4.826
xy0.347
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.084 0.058 0.000
y 0.058 5.055 0.000
z 0.000 0.000 2.002


<r2> (average value of r2) Å2
<r2> 44.277
(<r2>)1/2 6.654

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at HF/6-31G
 hartrees
Energy at 0K-2608.721111
Energy at 298.15K 
HF Energy-2608.721111
Nuclear repulsion energy78.648931
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/6-31G
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 3361 3035 5.18 123.40 0.12 0.21
2 A1 1480 1336 52.78 0.52 0.62 0.77
3 A1 643 580 22.67 22.91 0.35 0.52
4 B1 141i 127i 100.88 1.53 0.75 0.86
5 B2 3540 3196 0.02 58.84 0.75 0.86
6 B2 979 884 0.85 8.71 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4930.6 cm-1
Scaled (by 0.9029) Zero Point Vibrational Energy (zpe) 4451.9 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/6-31G
ABC
9.27959 0.35680 0.34359

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.535
Br2 0.000 0.000 0.379
H3 0.000 0.949 -2.021
H4 0.000 -0.949 -2.021

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.91381.06661.0666
Br21.91382.58102.5810
H31.06662.58101.8987
H41.06662.58101.8987

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 117.122 Br2 C1 H4 117.122
H3 C1 H4 125.756
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.490      
2 Br 0.045      
3 H 0.223      
4 H 0.223      


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 -1.755 1.755
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.522 0.000 0.000
y 0.000 -24.457 0.000
z 0.000 0.000 -21.653
Traceless
 xyz
x -3.466 0.000 0.000
y 0.000 -0.370 0.000
z 0.000 0.000 3.836
Polar
3z2-r27.672
x2-y2-2.065
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.076 0.000 0.000
y 0.000 2.001 0.000
z 0.000 0.000 5.044


<r2> (average value of r2) Å2
<r2> 44.256
(<r2>)1/2 6.652