Description General description 1-Chloro-6-iodohexane is an α,ω-dihaloalkane. 1,12-dichlorododecane is formed as a major product from the reduction of 1-chloro-6-iodohexane with nickel(I) salen. It affords 8-chloro-1-octyne on coupling with sodium acetylide. Application 1-Chloro-6-iodohexane may be used in the preparation of 1,14-dichloro-7-tetradecyne and 10-2′-(methylphenyl)-7-decynyl chloride. Packaging 10 g in glass bottle