Substitutedtriiodoallenes (VIa, b, c and IX) were synthesized from the corresponding subsituted propynes (Va, b, c and VIII) as an extension of the acetylene-allene rearrangement of 1,3-diiodopropyne (II). A modification of the polyodoallene synthesis using various iodoethynyl compounds (XIIa-d) such as iodinating reagents has been described.