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All results from a given calculation for CH2BrI (bromoiodomethane)

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-9487.322698
Energy at 298.15K 
HF Energy-9486.983278
Nuclear repulsion energy459.844079
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 MP2/3-21G*
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' 3168 3013 0.46 74.56 0.09 0.17
2 A' 1519 1445 0.52 17.36 0.72 0.84
3 A' 1241 1181 79.07 1.89 0.33 0.49
4 A' 656 624 54.71 6.91 0.75 0.86
5 A' 538 511 6.80 15.95 0.14 0.24
6 A' 143 136 0.06 4.36 0.44 0.62
7 A" 3254 3096 1.84 51.07 0.75 0.86
8 A" 1143 1087 0.02 8.64 0.75 0.86
9 A" 803 764 7.45 2.53 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6232.0 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 5928.5 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 MP2/3-21G*
ABC
0.76477 0.02885 0.02795

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.133 0.000
Br2 1.906 0.722 0.000
I3 -1.250 -0.669 0.000
H4 -0.231 1.691 0.904
H5 -0.231 1.691 -0.904

Atom - Atom Distances (Å)
  C1 Br2 I3 H4 H5
C11.94982.19271.08731.0873
Br21.94983.44852.51502.5150
I32.19273.44852.72452.7245
H41.08732.51502.72451.8079
H51.08732.51502.72451.8079

picture of bromoiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Br2 C1 I3 112.573 Br2 C1 H4 108.443
Br2 C1 H5 108.443 I3 C1 H4 107.485
I3 C1 H5 107.485 H4 C1 H5 112.478
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability