AN IMPROVED PROCEDURE FOR THE PREPARATION OF 2-HALO-1,3-DIETHYNYLBENZENE AND 2-HALO-1,4-DIETHYNYLBENZENE AND THEIR OXIDATIVE POLYMERIZATION - SYNTHESIS AND CHARACTERIZATION OF THE CORRESPONDING POLYMERS VIA OXIDATIVE POLYMERIZATION

The paper describes a rapid and convenient route for the preparation of 2-halo-1,3- and -1,4-diethynylbenzenes (halogen = Cl, Pr, I) starting from 2-nitro-1,3- and -1,4-diacetylbenzenes. The compounds are sensitive to light and decompose easily. Their preparation opens the way to the synthesis of widely substituted poly-(diethynylbenzene)-type polymers. Some were prepared and characterized for their stability and electrical properties, and the influence of halo-substituents examined.