9220. Tetraiodoethylene

Nomenclature

CAS number: 513-92-8
1,1,2,2-Tetraiodoethene; diiodoform; ethylene periodide; ethylene tetraiodide.
C2I4; mol wt 531.64.
C 4.52%, I 95.48%.

Description and references

Prepd by the action of iodine on diodoacetylene obtained from calcium carbide and iodine. Crystal and molecular structure: B. C. Haywood, R. Shirley, Acta Crystallogr. B33, 1765 (1977).

Chemical structure

Properties

Light yellow, heavy, small, practically odorless crystals; characteristic odor. On exposure to light turns brown. d 2.98. mp 187°. Insol in water; sol in benzene, chloroform, toluene, CS2, slightly in ether. Protect from light.