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

using model chemistry: G4

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at G4
 hartrees
Energy at 0K-5185.870377
Energy at 298.15K-5185.865457
HF Energy-5186.387715
Nuclear repulsion energy336.350301
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' 3229 3116 0.70 83.66 0.28 0.44
2 A' 631 609 5.37 5.86 0.12 0.22
3 A' 360 347 23.43 8.03 0.12 0.21
4 A' 190 183 0.15 2.75 0.42 0.59
5 A" 1196 1154 52.09 1.21 0.75 0.86
6 A" 805 776 110.34 0.93 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3205.1 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 3092.9 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
1.29888 0.04158 0.04031

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 0.005 0.821 0.000
H2 -0.410 1.819 0.000
Br3 0.005 -0.096 1.602
Br4 0.005 -0.096 -1.602

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.08091.84621.8462
H21.08092.53132.5313
Br31.84622.53133.2049
Br41.84622.53133.2049

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 116.058 H2 C1 Br4 116.058
Br3 C1 Br4 120.441
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 -0.374      
2 H 0.170      
3 Br 0.102      
4 Br 0.102      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.342 0.663 0.000 0.746
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> 213.668
(<r2>)1/2 14.617