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

using model chemistry: mPW1PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at mPW1PW91/6-31G*
 hartrees
Energy at 0K-5182.355500
Energy at 298.15K 
HF Energy-5182.355500
Nuclear repulsion energy339.297724
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 mPW1PW91/6-31G*
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' 3274 3105 1.20 96.58 0.27 0.43
2 A' 632 599 8.51 5.62 0.25 0.40
3 A' 426 404 27.40 9.70 0.09 0.17
4 A' 192 182 0.08 3.31 0.49 0.66
5 A" 1202 1139 58.57 2.56 0.75 0.86
6 A" 778 738 126.43 1.51 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3251.9 cm-1
Scaled (by 0.9483) Zero Point Vibrational Energy (zpe) 3083.8 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 mPW1PW91/6-31G*
ABC
1.25870 0.04150 0.04021

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.839 0.000
H2 -0.490 1.800 0.000
Br3 0.006 -0.098 1.604
Br4 0.006 -0.098 -1.604

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.08141.85741.8574
H21.08142.53372.5337
Br31.85742.53373.2078
Br41.85742.53373.2078

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 116.622 H2 C1 Br4 116.622
Br3 C1 Br4 119.426
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.207      
2 H 0.243      
3 Br -0.018      
4 Br -0.018      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.480 0.682 0.000 0.834
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.796 -0.973 0.000
y -0.973 -39.930 0.000
z 0.000 0.000 -40.625
Traceless
 xyz
x -2.518 -0.973 0.000
y -0.973 1.780 0.000
z 0.000 0.000 0.738
Polar
3z2-r21.475
x2-y2-2.865
xy-0.973
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.952 -0.182 0.000
y -0.182 5.198 0.000
z 0.000 0.000 9.494


<r2> (average value of r2) Å2
<r2> 214.130
(<r2>)1/2 14.633