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All results from a given calculation for CH2BrI (bromoiodomethane)

using model chemistry: QCISD/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 QCISD/3-21G*
 hartrees
Energy at 0K-9487.350385
Energy at 298.15K 
HF Energy-9486.982991
Nuclear repulsion energy458.273808
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 QCISD/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' 3124 3002 1.50      
2 A' 1501 1443 0.37      
3 A' 1229 1182 74.24      
4 A' 649 623 45.28      
5 A' 529 509 4.45      
6 A' 141 136 0.08      
7 A" 3204 3080 0.66      
8 A" 1131 1087 0.02      
9 A" 790 760 7.06      

Unscaled Zero Point Vibrational Energy (zpe) 6149.5 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 5910.3 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 QCISD/3-21G*
ABC
0.76193 0.02864 0.02775

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.134 0.000
Br2 1.913 0.724 0.000
I3 -1.255 -0.671 0.000
H4 -0.231 1.697 0.905
H5 -0.231 1.697 -0.905

Atom - Atom Distances (Å)
  C1 Br2 I3 H4 H5
C11.95672.19821.09021.0902
Br21.95673.46122.52232.5223
I32.19823.46122.73342.7334
H41.09022.52232.73341.8099
H51.09022.52232.73341.8099

picture of bromoiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 I3 112.695 Br2 C1 H4 108.375
Br2 C1 H5 108.375 I3 C1 H4 107.618
I3 C1 H5 107.618 H4 C1 H5 112.222
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability