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All results from a given calculation for CCl2I2 (dichlorodiiodomethane)

using model chemistry: CCSD/cc-pVTZ-PP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CCSD/cc-pVTZ-PP
 hartrees
Energy at 0K-1547.189056
Energy at 298.15K 
HF Energy-1546.190744
Nuclear repulsion energy560.643782
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 CCSD/cc-pVTZ-PP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 753 718 79.47      
2 A1 362 345 0.02      
3 A1 213 203 0.07      
4 A1 114 109 0.06      
5 A2 159 152 0.00      
6 B1 678 647 63.35      
7 B1 198 189 0.23      
8 B2 787 751 73.73      
9 B2 234 223 0.37      

Unscaled Zero Point Vibrational Energy (zpe) 1749.1 cm-1
Scaled (by 0.954) Zero Point Vibrational Energy (zpe) 1668.7 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 CCSD/cc-pVTZ-PP
ABC
0.03892 0.01793 0.01558

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/cc-pVTZ-PP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.656
Cl2 0.000 1.444 1.685
Cl3 0.000 -1.444 1.685
I4 1.769 0.000 -0.578
I5 -1.769 0.000 -0.578

Atom - Atom Distances (Å)
  C1 Cl2 Cl3 I4 I5
C11.77371.77372.15702.1570
Cl21.77372.88893.21543.2154
Cl31.77372.88893.21543.2154
I42.15703.21543.21543.5386
I52.15703.21543.21543.5386

picture of dichlorodiiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Cl2 C1 Cl3 109.046 Cl2 C1 I4 109.388
Cl2 C1 I5 109.388 Cl3 C1 I4 109.388
Cl3 C1 I5 109.388 I4 C1 I5 110.221
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability