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: BLYP/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 BLYP/6-31G**
 hartrees
Energy at 0K-2610.930217
Energy at 298.15K-2610.934015
HF Energy-2610.930217
Nuclear repulsion energy79.522318
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 BLYP/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' 3108 3084 5.84      
2 A' 1358 1347 22.41      
3 A' 662 657 19.63      
4 A' 289 286 65.23      
5 A" 3264 3238 0.39      
6 A" 910 903 1.26      

Unscaled Zero Point Vibrational Energy (zpe) 4795.0 cm-1
Scaled (by 0.9923) Zero Point Vibrational Energy (zpe) 4758.1 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 BLYP/6-31G**
ABC
8.91874 0.36687 0.35289

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.007 1.511 0.000
Br2 -0.007 -0.373 0.000
H3 0.142 2.000 0.959
H4 0.142 2.000 -0.959

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.88481.08691.0869
Br21.88482.56442.5644
H31.08692.56441.9185
H41.08692.56441.9185

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 116.720 Br2 C1 H4 116.720
H3 C1 H4 123.910
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.222      
2 Br -0.049      
3 H 0.136      
4 H 0.136      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.259 0.882 0.000 0.919
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.837 0.553 0.000
y 0.553 -21.606 0.000
z 0.000 0.000 -24.117
Traceless
 xyz
x -2.976 0.553 0.000
y 0.553 3.371 0.000
z 0.000 0.000 -0.395
Polar
3z2-r2-0.790
x2-y2-4.231
xy0.553
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.424 0.069 0.000
y 0.069 5.696 0.000
z 0.000 0.000 3.234


<r2> (average value of r2) Å2
<r2> 43.369
(<r2>)1/2 6.585

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at BLYP/6-31G**
 hartrees
Energy at 0K-2610.930171
Energy at 298.15K 
HF Energy-2610.930171
Nuclear repulsion energy79.579858
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 BLYP/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 3116 3092 4.50 110.69 0.12 0.21
2 A1 1356 1345 23.48 2.77 0.65 0.79
3 A1 662 657 18.11 10.83 0.23 0.38
4 B1 210i 208i 75.66 0.41 0.75 0.86
5 B2 3276 3251 0.09 60.16 0.75 0.86
6 B2 902 895 1.42 4.78 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4550.9 cm-1
Scaled (by 0.9923) Zero Point Vibrational Energy (zpe) 4515.9 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 BLYP/6-31G**
ABC
9.01207 0.36742 0.35303

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

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 0.373
H3 0.000 0.963 -2.010
H4 0.000 -0.963 -2.010

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.88201.08581.0858
Br21.88202.57042.5704
H31.08582.57041.9267
H41.08582.57041.9267

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 117.478 Br2 C1 H4 117.478
H3 C1 H4 125.044
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.225      
2 Br -0.047      
3 H 0.136      
4 H 0.136      


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 -0.891 0.891
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.889 0.000 0.000
y 0.000 -24.074 0.000
z 0.000 0.000 -21.521
Traceless
 xyz
x -3.091 0.000 0.000
y 0.000 -0.369 0.000
z 0.000 0.000 3.461
Polar
3z2-r26.921
x2-y2-1.815
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.401 0.000 0.000
y 0.000 3.222 0.000
z 0.000 0.000 5.672


<r2> (average value of r2) Å2
<r2> 43.352
(<r2>)1/2 6.584