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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: CCSD(T)/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(T)/6-311G**
 hartrees
Energy at 0K-13873.254646
Energy at 298.15K 
HF Energy-13872.657189
Nuclear repulsion energy609.468860
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)/6-311G**
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 3143 3032        
2 A1 1424 1373        
3 A1 482 465        
4 A1 119 115        
5 A2 1079 1041        
6 B1 3225 3111        
7 B1 728 702        
8 B2 1175 1134        
9 B2 580 559        

Unscaled Zero Point Vibrational Energy (zpe) 5976.9 cm-1
Scaled (by 0.9647) Zero Point Vibrational Energy (zpe) 5765.9 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)/6-311G**
ABC
0.74794 0.01977 0.01934

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.056
I2 0.000 1.831 -0.091
I3 0.000 -1.831 -0.091
H4 -0.898 0.000 1.669
H5 0.898 0.000 1.669

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.16052.16051.08771.0877
I22.16053.66192.69412.6941
I32.16053.66192.69412.6941
H41.08772.69412.69411.7963
H51.08772.69412.69411.7963

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 115.874 I2 C1 H4 107.423
I2 C1 H5 107.423 I3 C1 H4 107.423
I3 C1 H5 107.423 H4 C1 H5 111.329
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability