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All results from a given calculation for CHBr2 (dibromomethyl radical)

using model chemistry: B3PW91/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at B3PW91/STO-3G
 hartrees
Energy at 0K-5130.230838
Energy at 298.15K 
HF Energy-5130.230838
Nuclear repulsion energy333.274258
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 B3PW91/STO-3G
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' 3424 3030 0.37 41.48 0.40 0.57
2 A' 671 594 14.90 4.90 0.28 0.44
3 A' 424 375 14.78 5.44 0.15 0.25
4 A' 201 178 0.41 2.73 0.63 0.77
5 A" 1328 1175 76.22 5.88 0.75 0.86
6 A" 908 803 111.01 2.36 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3477.2 cm-1
Scaled (by 0.885) Zero Point Vibrational Energy (zpe) 3077.3 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 B3PW91/STO-3G
ABC
1.32630 0.03958 0.03846

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.810 0.000
H2 -0.481 1.796 0.000
Br3 0.006 -0.095 1.642
Br4 0.006 -0.095 -1.642

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.10031.87511.8751
H21.10032.55182.5518
Br31.87512.55183.2849
Br41.87512.55183.2849

picture of dibromomethyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 Br3 115.637 H2 C1 Br4 115.637
Br3 C1 Br4 122.307
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.213      
2 H 0.099      
3 Br 0.057      
4 Br 0.057      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.393 0.608 0.000 0.724
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -38.536 -0.554 0.000
y -0.554 -37.412 0.000
z 0.000 0.000 -39.268
Traceless
 xyz
x -0.197 -0.554 0.000
y -0.554 1.491 0.000
z 0.000 0.000 -1.294
Polar
3z2-r2-2.588
x2-y2-1.125
xy-0.554
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.597 -0.141 0.000
y -0.141 1.659 0.000
z 0.000 0.000 5.196


<r2> (average value of r2) Å2
<r2> 220.843
(<r2>)1/2 14.861