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All results from a given calculation for CCl2I2 (dichlorodiiodomethane)

using model chemistry: CCSD/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-1551.684429
Energy at 298.15K 
HF Energy-1550.172723
Nuclear repulsion energy562.535817
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/Def2TZVPP
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 753 753 78.28      
2 A1 362 362 0.02      
3 A1 213 213 0.06      
4 A1 114 114 0.07      
5 A2 159 159 0.00      
6 B1 676 676 62.41      
7 B1 198 198 0.21      
8 B2 788 788 73.40      
9 B2 234 234 0.37      

Unscaled Zero Point Vibrational Energy (zpe) 1748.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 1748.8 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/Def2TZVPP
ABC
0.03911 0.01808 0.01572

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.655
Cl2 0.000 1.442 1.681
Cl3 0.000 -1.442 1.681
I4 1.761 0.000 -0.576
I5 -1.761 0.000 -0.576

Atom - Atom Distances (Å)
  C1 Cl2 Cl3 I4 I5
C11.76911.76912.14872.1487
Cl21.76912.88323.20513.2051
Cl31.76912.88323.20513.2051
I42.14873.20513.20513.5217
I52.14873.20513.20513.5217

picture of dichlorodiiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Cl2 C1 Cl3 109.148 Cl2 C1 I4 109.402
Cl2 C1 I5 109.402 Cl3 C1 I4 109.402
Cl3 C1 I5 109.402 I4 C1 I5 110.068
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability