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All results from a given calculation for CH2I2 (Diiodomethane)

using model chemistry: MP3/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP3/6-311G*
 hartrees
Energy at 0K-13873.215838
Energy at 298.15K 
HF Energy-13872.653982
Nuclear repulsion energy611.404355
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 MP3/6-311G*
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 3189 3189 0.30      
2 A1 1467 1467 0.01      
3 A1 496 496 0.28      
4 A1 122 122 0.03      
5 A2 1120 1120 0.00      
6 B1 3271 3271 2.89      
7 B1 754 754 10.58      
8 B2 1217 1217 100.99      
9 B2 604 604 29.44      

Unscaled Zero Point Vibrational Energy (zpe) 6120.1 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 6120.1 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 MP3/6-311G*
ABC
0.75215 0.01990 0.01946

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

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 -0.893 0.000 1.667
H5 0.893 0.000 1.667

Atom - Atom Distances (Å)
  C1 I2 I3 H4 H5
C12.15382.15381.08341.0834
I22.15383.65022.68642.6864
I32.15383.65022.68642.6864
H41.08342.68642.68641.7853
H51.08342.68642.68641.7853

picture of Diiodomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
I2 C1 I3 115.859 I2 C1 H4 107.511
I2 C1 H5 107.511 I3 C1 H4 107.511
I3 C1 H5 107.511 H4 C1 H5 110.961
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability