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All results from a given calculation for CCl2I2 (dichlorodiiodomethane)

using model chemistry: CISD/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 CISD/3-21G*
 hartrees
Energy at 0K-14728.745406
Energy at 298.15K 
HF Energy-14728.222858
Nuclear repulsion energy1263.801897
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 CISD/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 742 693 74.97      
2 A1 362 338 0.15      
3 A1 218 204 0.25      
4 A1 115 108 0.05      
5 A2 164 153 0.00      
6 B1 706 660 55.30      
7 B1 202 189 0.52      
8 B2 746 697 69.56      
9 B2 235 220 0.21      

Unscaled Zero Point Vibrational Energy (zpe) 1745.1 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 1630.6 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 CISD/3-21G*
ABC
0.03799 0.01735 0.01508

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.668
Cl2 0.000 1.458 1.708
Cl3 0.000 -1.458 1.708
I4 1.801 0.000 -0.586
I5 -1.801 0.000 -0.586

Atom - Atom Distances (Å)
  C1 Cl2 Cl3 I4 I5
C11.79111.79112.19402.1940
Cl21.79112.91583.26033.2603
Cl31.79112.91583.26033.2603
I42.19403.26033.26033.6017
I52.19403.26033.26033.6017

picture of dichlorodiiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Cl2 C1 Cl3 108.970 Cl2 C1 I4 109.379
Cl2 C1 I5 109.379 Cl3 C1 I4 109.379
Cl3 C1 I5 109.379 I4 C1 I5 110.333
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability