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: B3LYP/6-31G(2df,p)

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 B3LYP/6-31G(2df,p)
 hartrees
Energy at 0K-2611.120929
Energy at 298.15K-2611.124531
HF Energy-2611.120929
Nuclear repulsion energy81.187501
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 B3LYP/6-31G(2df,p)
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' 3184 3072 3.57      
2 A' 1396 1347 18.05      
3 A' 735 709 15.42      
4 A' 124 120 59.63      
5 A" 3335 3218 0.09      
6 A" 940 908 0.61      

Unscaled Zero Point Vibrational Energy (zpe) 4856.8 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 4686.8 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 B3LYP/6-31G(2df,p)
ABC
9.26256 0.38309 0.36787

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.000 1.473 0.000
Br2 -0.000 -0.366 0.000
H3 0.002 1.985 0.950
H4 0.002 1.985 -0.950

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.83941.07901.0790
Br21.83942.53542.5354
H31.07902.53541.9004
H41.07902.53541.9004

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 118.280 Br2 C1 H4 118.280
H3 C1 H4 123.439
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.378      
2 Br 0.063      
3 H 0.158      
4 H 0.158      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.003 0.986 0.000 0.986
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.752 0.006 0.000
y 0.006 -21.635 0.000
z 0.000 0.000 -23.980
Traceless
 xyz
x -2.944 0.006 0.000
y 0.006 3.231 0.000
z 0.000 0.000 -0.287
Polar
3z2-r2-0.573
x2-y2-4.117
xy0.006
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.194 0.001 0.000
y 0.001 5.879 0.000
z 0.000 0.000 3.825


<r2> (average value of r2) Å2
<r2> 42.256
(<r2>)1/2 6.500

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at B3LYP/6-31G(2df,p)
 hartrees
Energy at 0K-2611.120926
Energy at 298.15K 
HF Energy-2611.120926
Nuclear repulsion energy81.199771
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 B3LYP/6-31G(2df,p)
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 3183 3071 3.58 98.81 0.12 0.21
2 A1 1396 1347 17.99 2.57 0.74 0.85
3 A1 730 704 15.45 9.38 0.14 0.25
4 B1 128 124 59.62 0.24 0.75 0.86
5 B2 3333 3217 0.08 55.47 0.75 0.86
6 B2 940 907 0.60 2.26 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4854.7 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 4684.7 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 B3LYP/6-31G(2df,p)
ABC
9.26793 0.38320 0.36799

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.473
Br2 0.000 0.000 0.366
H3 0.000 0.950 -1.985
H4 0.000 -0.950 -1.985

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.83911.07901.0790
Br21.83912.53542.5354
H31.07902.53541.8999
H41.07902.53541.8999

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 118.310 Br2 C1 H4 118.310
H3 C1 H4 123.380
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.378      
2 Br 0.063      
3 H 0.158      
4 H 0.158      


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 -0.985 0.985
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.751 0.000 0.000
y 0.000 -23.982 0.000
z 0.000 0.000 -21.635
Traceless
 xyz
x -2.942 0.000 0.000
y 0.000 -0.288 0.000
z 0.000 0.000 3.231
Polar
3z2-r26.462
x2-y2-1.769
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.192 0.000 0.000
y 0.000 3.824 0.000
z 0.000 0.000 5.878


<r2> (average value of r2) Å2
<r2> 42.250
(<r2>)1/2 6.500