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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: CCSD/6-311G**

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/6-311G**
 hartrees
Energy at 0K-13873.238910
Energy at 298.15K 
HF Energy-13872.657321
Nuclear repulsion energy611.158701
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/6-311G**
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 3164 3164 1.10      
2 A1 1441 1441 0.34      
3 A1 492 492 0.20      
4 A1 122 122 0.02      
5 A2 1097 1097 0.00      
6 B1 3244 3244 1.49      
7 B1 739 739 8.49      
8 B2 1194 1194 113.86      
9 B2 599 599 29.44      

Unscaled Zero Point Vibrational Energy (zpe) 6045.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6045.0 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/6-311G**
ABC
0.75340 0.01988 0.01944

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.051
I2 0.000 1.826 -0.091
I3 0.000 -1.826 -0.091
H4 -0.895 0.000 1.666
H5 0.895 0.000 1.666

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.15372.15371.08611.0861
I22.15373.65222.68762.6876
I32.15373.65222.68762.6876
H41.08612.68762.68761.7900
H51.08612.68762.68761.7900

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 115.962 I2 C1 H4 107.478
I2 C1 H5 107.478 I3 C1 H4 107.478
I3 C1 H5 107.478 H4 C1 H5 110.990
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability