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(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 BLYP/6-31G(2df,p)
 hartrees
Energy at 0K-2611.100597
Energy at 298.15K-2611.104043
HF Energy-2611.100597
Nuclear repulsion energy80.549617
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(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' 3108 3091 3.74      
2 A' 1356 1349 18.56      
3 A' 707 703 14.18      
4 A' 49 48 58.42      
5 A" 3258 3240 0.02      
6 A" 916 911 0.61      

Unscaled Zero Point Vibrational Energy (zpe) 4696.6 cm-1
Scaled (by 0.9945) Zero Point Vibrational Energy (zpe) 4670.8 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 BLYP/6-31G(2df,p)
ABC
9.12623 0.37702 0.36207

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.000 1.486 0.000
Br2 -0.000 -0.369 0.000
H3 0.007 1.998 0.957
H4 0.007 1.998 -0.957

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.85481.08541.0854
Br21.85482.55282.5528
H31.08542.55281.9145
H41.08542.55281.9145

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 118.122 Br2 C1 H4 118.122
H3 C1 H4 123.749
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.350      
2 Br 0.075      
3 H 0.138      
4 H 0.138      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.012 0.886 0.000 0.886
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.743 0.026 0.000
y 0.026 -21.813 0.000
z 0.000 0.000 -24.021
Traceless
 xyz
x -2.826 0.026 0.000
y 0.026 3.069 0.000
z 0.000 0.000 -0.243
Polar
3z2-r2-0.487
x2-y2-3.930
xy0.026
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.217 0.003 0.000
y 0.003 6.066 0.000
z 0.000 0.000 3.886


<r2> (average value of r2) Å2
<r2> 42.726
(<r2>)1/2 6.537

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at BLYP/6-31G(2df,p)
 hartrees
Energy at 0K-2611.100595
Energy at 298.15K 
HF Energy-2611.100595
Nuclear repulsion energy80.552828
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(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 3105 3088 3.73 101.64 0.12 0.21
2 A1 1356 1348 18.50 3.03 0.72 0.84
3 A1 700 696 14.25 10.80 0.15 0.26
4 B1 56 56 58.45 0.22 0.75 0.86
5 B2 3255 3237 0.02 57.81 0.75 0.86
6 B2 916 911 0.60 2.66 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4694.3 cm-1
Scaled (by 0.9945) Zero Point Vibrational Energy (zpe) 4668.5 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(2df,p)
ABC
9.12190 0.37707 0.36210

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.486
Br2 0.000 0.000 0.369
H3 0.000 0.958 -1.997
H4 0.000 -0.958 -1.997

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.85471.08561.0856
Br21.85472.55262.5526
H31.08562.55261.9150
H41.08562.55261.9150

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 118.109 Br2 C1 H4 118.109
H3 C1 H4 123.783
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.350      
2 Br 0.075      
3 H 0.138      
4 H 0.138      


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 -0.886 0.886
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.743 0.000 0.000
y 0.000 -24.020 0.000
z 0.000 0.000 -21.815
Traceless
 xyz
x -2.826 0.000 0.000
y 0.000 -0.241 0.000
z 0.000 0.000 3.067
Polar
3z2-r26.134
x2-y2-1.723
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.215 0.000 0.000
y 0.000 3.886 0.000
z 0.000 0.000 6.065


<r2> (average value of r2) Å2
<r2> 42.724
(<r2>)1/2 6.536