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/6-311G**

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/6-311G**
 hartrees
Energy at 0K-2611.360669
Energy at 298.15K-2611.364686
HF Energy-2611.360669
Nuclear repulsion energy80.138477
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/6-311G**
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' 3299 2997 11.01      
2 A' 1492 1356 34.35      
3 A' 716 651 22.39      
4 A' 444 404 53.59      
5 A" 3454 3138 0.05      
6 A" 1005 913 1.24      

Unscaled Zero Point Vibrational Energy (zpe) 5205.4 cm-1
Scaled (by 0.9085) Zero Point Vibrational Energy (zpe) 4729.1 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/6-311G**
ABC
9.18100 0.37190 0.35822

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.008 1.502 0.000
Br2 -0.008 -0.371 0.000
H3 0.174 1.980 0.941
H4 0.174 1.980 -0.941

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.87291.07071.0707
Br21.87292.53872.5387
H31.07072.53871.8812
H41.07072.53871.8812

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 116.517 Br2 C1 H4 116.517
H3 C1 H4 122.911
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.264      
2 Br -0.050      
3 H 0.157      
4 H 0.157      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.310 1.492 0.000 1.524
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.508 0.653 0.000
y 0.653 -21.576 0.000
z 0.000 0.000 -24.651
Traceless
 xyz
x -3.394 0.653 0.000
y 0.653 4.004 0.000
z 0.000 0.000 -0.610
Polar
3z2-r2-1.219
x2-y2-4.932
xy0.653
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.230 0.077 0.000
y 0.077 5.272 0.000
z 0.000 0.000 2.800


<r2> (average value of r2) Å2
<r2> 43.167
(<r2>)1/2 6.570

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at HF/6-311G**
 hartrees
Energy at 0K-2611.360481
Energy at 298.15K 
HF Energy-2611.360481
Nuclear repulsion energy80.228710
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/6-311G**
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 3309 3006 8.48 114.11 0.13 0.23
2 A1 1489 1352 37.13 0.42 0.57 0.73
3 A1 719 653 19.75 13.64 0.28 0.44
4 B1 327i 297i 70.22 0.31 0.75 0.86
5 B2 3472 3155 0.08 56.08 0.75 0.86
6 B2 992 901 1.46 3.62 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4826.8 cm-1
Scaled (by 0.9085) Zero Point Vibrational Energy (zpe) 4385.1 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/6-311G**
ABC
9.32270 0.37280 0.35847

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.498
Br2 0.000 0.000 0.371
H3 0.000 0.947 -1.994
H4 0.000 -0.947 -1.994

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.86861.06941.0694
Br21.86862.54762.5476
H31.06942.54761.8943
H41.06942.54761.8943

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 117.660 Br2 C1 H4 117.660
H3 C1 H4 124.679
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.277      
2 Br -0.044      
3 H 0.160      
4 H 0.160      


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 -1.487 1.487
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.596 0.000 0.000
y 0.000 -24.579 0.000
z 0.000 0.000 -21.464
Traceless
 xyz
x -3.574 0.000 0.000
y 0.000 -0.549 0.000
z 0.000 0.000 4.123
Polar
3z2-r28.246
x2-y2-2.017
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.209 0.000 0.000
y 0.000 2.789 0.000
z 0.000 0.000 5.240


<r2> (average value of r2) Å2
<r2> 43.144
(<r2>)1/2 6.568