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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: MP3=FULL/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 MP3=FULL/6-311G**
 hartrees
Energy at 0K-13874.172557
Energy at 298.15K 
HF Energy-13872.657418
Nuclear repulsion energy611.674742
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 MP3=FULL/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 3203 3203 0.52      
2 A1 1447 1447 0.14      
3 A1 496 496 0.15      
4 A1 122 122 0.02      
5 A2 1104 1104 0.00      
6 B1 3283 3283 2.08      
7 B1 740 740 8.88      
8 B2 1204 1204 107.82      
9 B2 608 608 25.42      

Unscaled Zero Point Vibrational Energy (zpe) 6103.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6103.8 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 MP3=FULL/6-311G**
ABC
0.75724 0.01991 0.01947

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.048
I2 0.000 1.825 -0.091
I3 0.000 -1.825 -0.091
H4 -0.892 0.000 1.662
H5 0.892 0.000 1.662

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.15122.15121.08331.0833
I22.15123.64992.68332.6833
I32.15123.64992.68332.6833
H41.08332.68332.68331.7848
H51.08332.68332.68331.7848

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 116.064 I2 C1 H4 107.467
I2 C1 H5 107.467 I3 C1 H4 107.467
I3 C1 H5 107.467 H4 C1 H5 110.929
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability