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: 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-7384.111453
Energy at 298.15K 
HF Energy-7383.938515
Nuclear repulsion energy278.718686
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' 3200 3055 1.84 86.70 0.11 0.19
2 A' 1518 1448 1.64 19.94 0.72 0.84
3 A' 1266 1208 67.51 0.66 0.74 0.85
4 A' 653 623 74.60 14.75 0.55 0.71
5 A' 536 512 4.29 15.41 0.22 0.36
6 A' 187 179 0.61 9.69 0.56 0.71
7 A" 3290 3140 0.24 58.85 0.75 0.86
8 A" 1154 1102 0.01 18.08 0.75 0.86
9 A" 808 771 7.11 6.12 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6305.7 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 6018.7 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
0.84851 0.04950 0.04720

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 0.848 -1.065 0.000
Cl2 -0.468 -2.440 0.000
I3 0.000 0.949 0.000
H4 1.432 -1.209 0.902
H5 1.432 -1.209 -0.902

Atom - Atom Distances (Å)
  C1 Cl2 I3 H4 H5
C11.90282.18521.08451.0845
Cl21.90283.42132.43652.4365
I32.18523.42132.74272.7427
H41.08452.43652.74271.8048
H51.08452.43652.74271.8048

picture of chloroiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Cl2 C1 I3 113.446 Cl2 C1 H4 106.027
Cl2 C1 H5 106.027 I3 C1 H4 109.357
I3 C1 H5 109.357 H4 C1 H5 112.631
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability