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All results from a given calculation for CH2BrI (bromoiodomethane)

using model chemistry: BLYP/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 BLYP/3-21G*
 hartrees
Energy at 0K-9491.732365
Energy at 298.15K 
HF Energy-9491.732365
Nuclear repulsion energy453.018908
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 BLYP/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' 3066 3046 1.61 84.13 0.09 0.16
2 A' 1436 1427 0.27 20.89 0.70 0.82
3 A' 1162 1154 76.83 2.20 0.35 0.51
4 A' 583 580 85.74 4.14 0.74 0.85
5 A' 490 487 15.89 20.09 0.14 0.25
6 A' 132 131 0.01 7.13 0.42 0.59
7 A" 3153 3133 0.33 54.83 0.75 0.86
8 A" 1074 1067 0.04 7.93 0.75 0.86
9 A" 746 742 8.77 2.73 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 5921.0 cm-1
Scaled (by 0.9935) Zero Point Vibrational Energy (zpe) 5882.5 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 BLYP/3-21G*
ABC
0.77410 0.02781 0.02699

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.129 0.000
Br2 1.932 0.757 0.000
I3 -1.267 -0.691 0.000
H4 -0.241 1.685 0.910
H5 -0.241 1.685 -0.910

Atom - Atom Distances (Å)
  C1 Br2 I3 H4 H5
C11.96792.21771.09291.0929
Br21.96793.51222.53202.5320
I32.21773.51222.74342.7434
H41.09292.53202.74341.8192
H51.09292.53202.74341.8192

picture of bromoiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 I3 113.962 Br2 C1 H4 108.209
Br2 C1 H5 108.209 I3 C1 H4 106.950
I3 C1 H5 106.950 H4 C1 H5 112.665
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.552      
2 Br -0.014      
3 I 0.052      
4 H 0.257      
5 H 0.257      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.408 1.234 0.000 1.300
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -53.195 -0.190 0.000
y -0.190 -49.799 0.000
z 0.000 0.000 -53.151
Traceless
 xyz
x -1.720 -0.190 0.000
y -0.190 3.374 0.000
z 0.000 0.000 -1.654
Polar
3z2-r2-3.308
x2-y2-3.396
xy-0.190
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 10.683 2.202 0.000
y 2.202 7.439 0.000
z 0.000 0.000 5.414


<r2> (average value of r2) Å2
<r2> 308.797
(<r2>)1/2 17.573