Abstract
Abstract It has been shown that primary alkylamine complexes of zinc bis(dimethyl-dithiocarbamate) (ZDMC) are thermally unstable. The reaction proceeds via an amine exchange reaction to yield an intermediate zinc alkyldithio-carbamate dimethyldithiocarbamate which then decomposes to give N-alkyl-N′, N′-dimethylthiourea, the dimethylammonium salt of dimethyldithio-carbamic acid, and zinc sulfide as the major products. Secondary amine complexes undergo similar initial amine exchange reactions but the new dithiocarbamates produced are stable. Tertiary amine complexes undergo neither of these reactions. These reactions can occur when zinc dithiocarbamates are used as accelerators for the vulcanization of rubber.
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