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All results from a given calculation for CCl2I2 (dichlorodiiodomethane)

using model chemistry: CCSD(T)/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(T)/Def2TZVPP
 hartrees
Energy at 0K-1551.736825
Energy at 298.15K 
HF Energy-1550.172648
Nuclear repulsion energy560.682202
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(T)/Def2TZVPP
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 725 725        
2 A1 354 354        
3 A1 208 208        
4 A1 112 112        
5 A2 156 156        
6 B1 647 647        
7 B1 194 194        
8 B2 761 761        
9 B2 229 229        

Unscaled Zero Point Vibrational Energy (zpe) 1693.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 1693.0 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 CCSD(T)/Def2TZVPP
ABC
0.03882 0.01797 0.01562

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.660
Cl2 0.000 1.446 1.687
Cl3 0.000 -1.446 1.687
I4 1.766 0.000 -0.578
I5 -1.766 0.000 -0.578

Atom - Atom Distances (Å)
  C1 Cl2 Cl3 I4 I5
C11.77381.77382.15712.1571
Cl21.77382.89273.21613.2161
Cl31.77382.89273.21613.2161
I42.15713.21613.21613.5321
I52.15713.21613.21613.5321

picture of dichlorodiiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Cl2 C1 Cl3 109.253 Cl2 C1 I4 109.415
Cl2 C1 I5 109.415 Cl3 C1 I4 109.415
Cl3 C1 I5 109.415 I4 C1 I5 109.911
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability