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

using model chemistry: B3LYP/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at B3LYP/3-21G*
 hartrees
Energy at 0K-5162.509035
Energy at 298.15K 
HF Energy-5162.509035
Nuclear repulsion energy335.789128
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/3-21G*
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' 3228 3105 0.99 94.67 0.29 0.45
2 A' 622 598 7.70 6.27 0.26 0.41
3 A' 352 339 41.07 9.25 0.11 0.20
4 A' 181 174 0.31 3.57 0.55 0.71
5 A" 1207 1162 55.46 3.24 0.75 0.86
6 A" 783 753 121.02 1.72 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3186.3 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 3065.3 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/3-21G*
ABC
1.25136 0.04056 0.03931

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.840 0.000
H2 -0.430 1.830 0.000
Br3 0.006 -0.098 1.622
Br4 0.006 -0.098 -1.622

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.08161.87401.8740
H21.08162.55712.5571
Br31.87402.55713.2449
Br41.87402.55713.2449

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 117.260 H2 C1 Br4 117.260
Br3 C1 Br4 119.940
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.295      
2 H 0.249      
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
  -0.478 0.524 0.000 0.709
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.719 -0.919 0.000
y -0.919 -39.800 0.000
z 0.000 0.000 -39.748
Traceless
 xyz
x -2.945 -0.919 0.000
y -0.919 1.433 0.000
z 0.000 0.000 1.512
Polar
3z2-r23.024
x2-y2-2.919
xy-0.919
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.266 -0.189 0.000
y -0.189 4.687 0.000
z 0.000 0.000 9.172


<r2> (average value of r2) Å2
<r2> 218.163
(<r2>)1/2 14.770