1,2-Diiodoethane
# 1,2-Diiodoethane

1,2-Diiodoethane is an organoiodine compound.

## Preparation and reactions

1,2-Diiodoethane can be prepared by the reaction of ethylene with iodine $(I_2):$

    $C_2H_4$ + $I_2$ ⇌ $C_2H_4I_2$

1,2-Diiodoethane is most commonly used in organic synthesis in the preparation of samarium(II) iodide or ytterbium(II) iodide in an inert solvent such as THF.

    Sm + $ICH_2CH_2I$ → $SmI_2$ + $H_2C=CH_2$

## Spectral properties

In mass spectroscopy, 1,2-diiodoethane exhibits 5 major peaks, with the base peak showing at 155 m/z, which is the loss of one iodine atom (127 m/z).

