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All results from a given calculation for CH2BrI (bromoiodomethane)

using model chemistry: B3PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/3-21G*
 hartrees
Energy at 0K-9491.838405
Energy at 298.15K 
HF Energy-9491.838405
Nuclear repulsion energy462.002865
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 B3PW91/3-21G*
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' 3145 3017 0.65      
2 A' 1474 1414 0.27      
3 A' 1213 1164 64.68      
4 A' 649 623 68.20      
5 A' 538 516 6.68      
6 A' 140 134 0.04      
7 A" 3232 3101 1.95      
8 A" 1125 1079 0.06      
9 A" 778 746 10.10      

Unscaled Zero Point Vibrational Energy (zpe) 6147.0 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 5897.4 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 B3PW91/3-21G*
ABC
0.78928 0.02902 0.02814

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.112 0.000
Br2 1.898 0.727 0.000
I3 -1.244 -0.669 0.000
H4 -0.235 1.674 0.902
H5 -0.235 1.674 -0.902

Atom - Atom Distances (Å)
  C1 Br2 I3 H4 H5
C11.93632.17291.08801.0880
Br21.93633.43832.50152.5015
I32.17293.43832.70592.7059
H41.08802.50152.70591.8034
H51.08802.50152.70591.8034

picture of bromoiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 I3 113.466 Br2 C1 H4 108.320
Br2 C1 H5 108.320 I3 C1 H4 107.432
I3 C1 H5 107.432 H4 C1 H5 111.938
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.647      
2 Br -0.014      
3 I 0.072      
4 H 0.295      
5 H 0.295      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.502 1.254 0.000 1.351
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -53.261 -0.229 0.000
y -0.229 -49.592 0.000
z 0.000 0.000 -53.044
Traceless
 xyz
x -1.943 -0.229 0.000
y -0.229 3.561 0.000
z 0.000 0.000 -1.617
Polar
3z2-r2-3.234
x2-y2-3.669
xy-0.229
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 10.095 1.915 0.000
y 1.915 7.201 0.000
z 0.000 0.000 5.364


<r2> (average value of r2) Å2
<r2> 297.556
(<r2>)1/2 17.250