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All results from a given calculation for CCl2I2 (dichlorodiiodomethane)

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 298.15K0.047064
HF Energy0.047064
Nuclear repulsion energy127.561584
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 A1 900 876 362.97 553.95 0.06 0.11
2 A1 462 450 6.41 11.68 0.53 0.69
3 A1 236 230 3.16 5.03 0.50 0.67
4 A1 162 158 0.14 10.95 0.74 0.85
5 A2 158 153 0.00 11.28 0.75 0.86
6 B1 881 858 357.74 229.03 0.75 0.86
7 B1 216 210 6.19 0.90 0.75 0.86
8 B2 779 758 164.07 126.00 0.75 0.86
9 B2 241 235 1.87 20.79 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 2016.7 cm-1
Scaled (by 0.974) Zero Point Vibrational Energy (zpe) 1964.2 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
0.04159 0.02439 0.02080

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.764
Cl2 0.000 1.430 1.597
Cl3 0.000 -1.430 1.597
I4 1.470 0.000 -0.555
I5 -1.470 0.000 -0.555

Atom - Atom Distances (Å)
  C1 Cl2 Cl3 I4 I5
C11.65441.65441.97511.9751
Cl21.65442.85942.97242.9724
Cl31.65442.85942.97242.9724
I41.97512.97242.97242.9391
I51.97512.97242.97242.9391

picture of dichlorodiiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Cl2 C1 Cl3 119.576 Cl2 C1 I4 109.645
Cl2 C1 I5 109.645 Cl3 C1 I4 109.645
Cl3 C1 I5 109.645 I4 C1 I5 96.156
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability