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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: CID/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CID/Def2TZVPP
 hartrees
Energy at 0K-633.289758
Energy at 298.15K 
HF Energy-632.356216
Nuclear repulsion energy194.721518
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 CID/Def2TZVPP
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 3277 3277 0.11      
2 A1 1502 1502 0.09      
3 A1 535 535 0.17      
4 A1 128 128 0.01      
5 A2 1139 1139 0.00      
6 B1 3363 3363 4.54      
7 B1 771 771 7.29      
8 B2 1226 1226 102.71      
9 B2 669 669 26.19      

Unscaled Zero Point Vibrational Energy (zpe) 6304.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6304.1 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 CID/Def2TZVPP
ABC
0.77597 0.02096 0.02048

See section I.F.4 to change rotational constant units
Geometric Data calculated at CID/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.035
I2 0.000 1.779 -0.090
I3 0.000 -1.779 -0.090
H4 -0.882 0.000 1.643
H5 0.882 0.000 1.643

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.10452.10451.07131.0713
I22.10453.55722.63492.6349
I32.10453.55722.63492.6349
H41.07132.63492.63491.7649
H51.07132.63492.63491.7649

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 115.377 I2 C1 H4 107.641
I2 C1 H5 107.641 I3 C1 H4 107.641
I3 C1 H5 107.641 H4 C1 H5 110.923
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability