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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: CCD/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 CCD/6-311G*
 hartrees
Energy at 0K-13873.219775
Energy at 298.15K 
HF Energy-13872.653882
Nuclear repulsion energy611.327288
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 CCD/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 3153 3011 0.77      
2 A1 1460 1395 0.00      
3 A1 495 473 0.23      
4 A1 122 117 0.03      
5 A2 1117 1067 0.00      
6 B1 3235 3090 2.04      
7 B1 752 718 10.38      
8 B2 1213 1158 97.43      
9 B2 606 578 26.35      

Unscaled Zero Point Vibrational Energy (zpe) 6075.8 cm-1
Scaled (by 0.9551) Zero Point Vibrational Energy (zpe) 5803.0 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 CCD/6-311G*
ABC
0.75106 0.01990 0.01946

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.053
I2 0.000 1.825 -0.091
I3 0.000 -1.825 -0.091
H4 -0.894 0.000 1.670
H5 0.894 0.000 1.670

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.15392.15391.08631.0863
I22.15393.65032.68902.6890
I32.15393.65032.68902.6890
H41.08632.68902.68901.7885
H51.08632.68902.68901.7885

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 115.850 I2 C1 H4 107.548
I2 C1 H5 107.548 I3 C1 H4 107.548
I3 C1 H5 107.548 H4 C1 H5 110.807
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability