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

using model chemistry: G3B3

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at G3B3
 hartrees
Energy at 0K-5185.731888
Energy at 298.15K-5185.726914
HF Energy-5186.404612
Nuclear repulsion energy334.439621
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*
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' 3234 3106 1.33 98.67 0.28 0.44
2 A' 623 598 11.63 5.35 0.37 0.54
3 A' 458 440 20.81 13.91 0.08 0.15
4 A' 187 179 0.03 3.82 0.47 0.64
5 A" 1188 1141 58.60 2.79 0.75 0.86
6 A" 737 708 137.62 1.99 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3212.8 cm-1
Scaled (by 0.9603) Zero Point Vibrational Energy (zpe) 3085.3 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 B3LYP/6-31G*
ABC
1.23378 0.04071 0.03945

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.007 0.851 0.000
H2 -0.540 1.786 0.000
Br3 0.007 -0.098 1.619
Br4 0.007 -0.098 -1.619

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.08331.87711.8771
H21.08332.54412.5441
Br31.87712.54413.2385
Br41.87712.54413.2385

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 115.850 H2 C1 Br4 115.850
Br3 C1 Br4 120.515
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.167      
2 H 0.214      
3 Br -0.023      
4 Br -0.023      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.516 0.635 0.000 0.818
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


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


<r2> (average value of r2) Å2
<r2> 217.801
(<r2>)1/2 14.758