return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH2ClI (chloroiodomethane)

using model chemistry: PM3

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
Energy calculated at PM3
 hartrees
Energy at 0K 
Energy at 298.15K0.012452
HF Energy0.012452
Nuclear repulsion energy58.841171
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 PM3
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' 3073 2993 8.44 101.35 0.14 0.24
2 A' 1348 1313 16.17 26.35 0.48 0.65
3 A' 1199 1168 209.80 65.68 0.29 0.45
4 A' 764 744 113.36 136.85 0.32 0.48
5 A' 681 663 61.71 55.74 0.74 0.85
6 A' 253 246 0.47 12.92 0.71 0.83
7 A" 3037 2958 10.71 77.19 0.75 0.86
8 A" 1048 1021 0.40 30.03 0.75 0.86
9 A" 874 851 0.28 14.14 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6137.4 cm-1
Scaled (by 0.974) Zero Point Vibrational Energy (zpe) 5977.9 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 PM3
ABC
0.80073 0.06686 0.06245

See section I.F.4 to change rotational constant units
Geometric Data calculated at PM3

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.863 -1.003 0.000
Cl2 -0.480 -2.073 0.000
I3 0.000 0.820 0.000
H4 1.493 -1.114 0.898
H5 1.493 -1.114 -0.898

Atom - Atom Distances (Å)
  C1 Cl2 I3 H4 H5
C11.71682.01761.10251.1025
Cl21.71682.93262.37042.3704
I32.01762.93262.60372.6037
H41.10252.37042.60371.7953
H51.10252.37042.60371.7953

picture of chloroiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Cl2 C1 I3 103.203 Cl2 C1 H4 112.620
Cl2 C1 H5 112.620 I3 C1 H4 109.609
I3 C1 H5 109.609 H4 C1 H5 109.014
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability