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

using model chemistry: mPW1PW91/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-5187.270002
Energy at 298.15K 
HF Energy-5187.270002
Nuclear repulsion energy337.911450
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/cc-pVDZ
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' 3241 3106 1.48 104.55 0.25 0.40
2 A' 631 605 8.02 6.30 0.32 0.48
3 A' 427 409 28.78 9.32 0.07 0.12
4 A' 188 180 0.12 4.27 0.55 0.71
5 A" 1170 1121 56.74 2.13 0.75 0.86
6 A" 790 757 130.12 1.66 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 3223.2 cm-1
Scaled (by 0.9583) Zero Point Vibrational Energy (zpe) 3088.8 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/cc-pVDZ
ABC
1.27760 0.04103 0.03979

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.006 0.830 0.000
H2 -0.485 1.803 0.000
Br3 0.006 -0.097 1.613
Br4 0.006 -0.097 -1.613

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.09051.86031.8603
H21.09052.54052.5405
Br31.86032.54053.2259
Br41.86032.54053.2259

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 116.404 H2 C1 Br4 116.404
Br3 C1 Br4 120.235
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.216      
2 H 0.129      
3 Br 0.043      
4 Br 0.043      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.476 0.605 0.000 0.770
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.986 -0.939 0.000
y -0.939 -40.244 0.000
z 0.000 0.000 -40.586
Traceless
 xyz
x -2.571 -0.939 0.000
y -0.939 1.543 0.000
z 0.000 0.000 1.028
Polar
3z2-r22.057
x2-y2-2.742
xy-0.939
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.295 -0.179 0.000
y -0.179 4.766 0.000
z 0.000 0.000 9.373


<r2> (average value of r2) Å2
<r2> 216.176
(<r2>)1/2 14.703