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All results from a given calculation for CCl2I2 (dichlorodiiodomethane)

using model chemistry: CCD/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCD/3-21G
 hartrees
Energy at 0K-14728.151667
Energy at 298.15K 
HF Energy-14727.870591
Nuclear repulsion energy1229.240536
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 CCD/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 A1 659 641 69.44      
2 A1 312 303 0.23      
3 A1 197 191 0.53      
4 A1 112 109 0.08      
5 A2 150 145 0.00      
6 B1 658 640 62.57      
7 B1 186 181 1.02      
8 B2 647 629 65.34      
9 B2 222 215 0.15      

Unscaled Zero Point Vibrational Energy (zpe) 1570.5 cm-1
Scaled (by 0.9723) Zero Point Vibrational Energy (zpe) 1527.0 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 CCD/3-21G
ABC
0.03560 0.01641 0.01434

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.607
Cl2 0.000 1.524 1.761
Cl3 0.000 -1.524 1.761
I4 1.846 0.000 -0.599
I5 -1.846 0.000 -0.599

Atom - Atom Distances (Å)
  C1 Cl2 Cl3 I4 I5
C11.91211.91212.20482.2048
Cl21.91213.04843.36173.3617
Cl31.91213.04843.36173.3617
I42.20483.36173.36173.6916
I52.20483.36173.36173.6916

picture of dichlorodiiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Cl2 C1 Cl3 105.714 Cl2 C1 I4 109.282
Cl2 C1 I5 109.282 Cl3 C1 I4 109.282
Cl3 C1 I5 109.282 I4 C1 I5 113.692
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability