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

using model chemistry: B2PLYP=FULLultrafine/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 B2PLYP=FULLultrafine/6-31G*
 hartrees
Energy at 0K-5181.054999
Energy at 298.15K 
HF Energy-5180.924475
Nuclear repulsion energy337.165762
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 B2PLYP=FULLultrafine/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' 3268 3101 1.34 95.82 0.27 0.43
2 A' 635 602 12.48 5.02 0.41 0.58
3 A' 481 456 19.25 12.56 0.07 0.14
4 A' 190 180 0.03 3.60 0.47 0.64
5 A" 1208 1146 59.78 2.78 0.75 0.86
6 A" 754 716 131.17 1.73 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3268.1 cm-1
Scaled (by 0.9487) Zero Point Vibrational Energy (zpe) 3100.5 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 B2PLYP=FULLultrafine/6-31G*
ABC
1.23188 0.04103 0.03975

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.007 0.852 0.000
H2 -0.539 1.786 0.000
Br3 0.007 -0.099 1.613
Br4 0.007 -0.099 -1.613

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.08141.87231.8723
H21.08142.53962.5396
Br31.87232.53963.2261
Br41.87232.53963.2261

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 115.995 H2 C1 Br4 115.995
Br3 C1 Br4 118.974
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP=FULLultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.165      
2 H 0.223      
3 Br -0.029      
4 Br -0.029      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.515 0.689 0.000 0.860
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.065 -1.011 0.000
y -1.011 -40.394 0.005
z 0.000 0.005 -41.174
Traceless
 xyz
x -2.281 -1.011 0.000
y -1.011 1.726 0.005
z 0.000 0.005 0.555
Polar
3z2-r21.110
x2-y2-2.672
xy-1.011
xz0.000
yz0.005


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.923 -0.207 0.001
y -0.207 5.171 0.003
z 0.001 0.003 9.523


<r2> (average value of r2) Å2
<r2> 216.598
(<r2>)1/2 14.717