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/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-2613.489713
Energy at 298.15K-2613.493324
HF Energy-2613.489713
Nuclear repulsion energy80.556473
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/cc-pVTZ
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' 3171 3065 4.68      
2 A' 1382 1335 18.61      
3 A' 704 680 17.36      
4 A' 137 132 68.18      
5 A" 3327 3215 0.42      
6 A" 927 896 1.15      

Unscaled Zero Point Vibrational Energy (zpe) 4823.2 cm-1
Scaled (by 0.9666) Zero Point Vibrational Energy (zpe) 4662.1 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 B3LYP/cc-pVTZ
ABC
9.22512 0.37659 0.36182

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.000 1.489 0.000
Br2 -0.000 -0.369 0.000
H3 0.001 1.989 0.952
H4 0.001 1.989 -0.952

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.85811.07531.0753
Br21.85812.54292.5429
H31.07532.54291.9043
H41.07532.54291.9043

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 117.695 Br2 C1 H4 117.695
H3 C1 H4 124.609
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.276      
2 Br -0.001      
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
  0.001 0.970 0.000 0.970
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.424 0.003 0.000
y 0.003 -22.063 0.000
z 0.000 0.000 -24.486
Traceless
 xyz
x -3.149 0.003 0.000
y 0.003 3.392 0.000
z 0.000 0.000 -0.242
Polar
3z2-r2-0.484
x2-y2-4.361
xy0.003
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.086 0.000 0.000
y 0.000 6.206 0.000
z 0.000 0.000 3.557


<r2> (average value of r2) Å2
<r2> 42.988
(<r2>)1/2 6.557

Conformer 2 (C2V)

Jump to S1C1
Energy calculated at B3LYP/cc-pVTZ
 hartrees
Energy at 0K-2613.489704
Energy at 298.15K 
HF Energy-2613.489704
Nuclear repulsion energy80.553767
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/cc-pVTZ
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 3170 3065 4.66 119.02 0.11 0.19
2 A1 1381 1335 18.57 0.72 0.61 0.76
3 A1 697 674 17.44 10.44 0.19 0.32
4 B1 135 130 68.20 0.06 0.75 0.86
5 B2 3326 3215 0.43 56.42 0.75 0.86
6 B2 927 896 1.15 2.33 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 4818.0 cm-1
Scaled (by 0.9666) Zero Point Vibrational Energy (zpe) 4657.1 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 B3LYP/cc-pVTZ
ABC
9.22489 0.37656 0.36179

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.489
Br2 0.000 0.000 0.369
H3 0.000 0.952 -1.989
H4 0.000 -0.952 -1.989

Atom - Atom Distances (Å)
  C1 Br2 H3 H4
C11.85821.07531.0753
Br21.85822.54292.5429
H31.07532.54291.9043
H41.07532.54291.9043

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 117.689 Br2 C1 H4 117.689
H3 C1 H4 124.622
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.276      
2 Br -0.001      
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 -0.970 0.970
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.424 0.000 0.000
y 0.000 -24.486 0.000
z 0.000 0.000 -22.063
Traceless
 xyz
x -3.150 0.000 0.000
y 0.000 -0.242 0.000
z 0.000 0.000 3.392
Polar
3z2-r26.783
x2-y2-1.939
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.086 0.000 0.000
y 0.000 3.557 0.000
z 0.000 0.000 6.206


<r2> (average value of r2) Å2
<r2> 42.989
(<r2>)1/2 6.557