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

using model chemistry: ROHF/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at ROHF/6-31+G**
 hartrees
Energy at 0K-5178.195983
Energy at 298.15K 
HF Energy-5178.195983
Nuclear repulsion energy337.709003
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 ROHF/6-31+G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
A' 3423 2930 1.86      
A' 710 608 15.61      
A' 581 497 5.71      
A' 195 167 0.07      
A" 1311 1122 86.87      
A" 809 693 113.86      

Unscaled Zero Point Vibrational Energy (zpe) 3514.5 cm-1
Scaled (by 0.8559) Zero Point Vibrational Energy (zpe) 3008.1 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 ROHF/6-31+G**
ABC
1.23884 0.04114 0.03987

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.008 0.853 0.000
H2 -0.575 1.751 0.000
Br3 0.008 -0.098 1.611
Br4 0.008 -0.098 -1.611

Atom - Atom Distances (Å)
  C1 H2 Br3 Br4
C11.07041.87051.8705
H21.07042.52042.5204
Br31.87052.52043.2214
Br41.87052.52043.2214

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 115.242 H2 C1 Br4 115.242
Br3 C1 Br4 118.881
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROHF/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.057      
2 H 0.249      
3 Br -0.096      
4 Br -0.096      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.505 1.028 0.000 1.146
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -44.043 -1.078 0.000
y -1.078 -41.057 0.000
z 0.000 0.000 -42.986
Traceless
 xyz
x -2.022 -1.078 0.000
y -1.078 2.457 0.000
z 0.000 0.000 -0.436
Polar
3z2-r2-0.872
x2-y2-2.986
xy-1.078
xz0.000
yz0.000


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> 216.716
(<r2>)1/2 14.721