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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-13873.223275
Energy at 298.15K 
HF Energy-13872.653855
Nuclear repulsion energy610.629407
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
4/u)
Dep P Dep U
1 A1 3148 3002 0.97      
2 A1 1458 1390 0.01      
3 A1 491 468 0.26      
4 A1 121 116 0.03      
5 A2 1112 1060 0.00      
6 B1 3230 3080 1.86      
7 B1 750 715 10.24      
8 B2 1205 1149 104.27      
9 B2 596 568 31.22      

Unscaled Zero Point Vibrational Energy (zpe) 6054.9 cm-1
Scaled (by 0.9535) Zero Point Vibrational Energy (zpe) 5773.4 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
0.74896 0.01986 0.01942

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 1.055
I2 0.000 1.827 -0.091
I3 0.000 -1.827 -0.091
H4 -0.895 0.000 1.671
H5 0.895 0.000 1.671

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.15672.15671.08641.0864
I22.15673.65442.69142.6914
I32.15673.65442.69142.6914
H41.08642.69142.69141.7898
H51.08642.69142.69141.7898

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 115.818 I2 C1 H4 107.533
I2 C1 H5 107.533 I3 C1 H4 107.533
I3 C1 H5 107.533 H4 C1 H5 110.909
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability