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Trialkyltin n-Bu 3 SnH, an endocrine disruptor, was slowly converted by the catalytic action of group 4 Cp 2 MCl 2 /Red-Al (M = Ti, Zr, Hf) to produce two phases of products: one is an insoluble cross-linked solid, polystannane in 7-23%yield as minor product via redistribution/dehydrocoupling combination process, and the other is an oil, hexabutyldistannanein 69-90% yield as major product via simple dehydrocoupling process. Redistribution/dehydrocoupling process firstproduced a low-molecular-weight oligostannane possessing partial backbone Sn-H bonds which then underwent anextensive cross-linking reaction of backbone Sn-H bonds, leading to an insoluble polystannane. This is the first excitingexample of redistribution/dehydrocoupling of a tertiary hydrostannane catalyzed by early transition metallocenes.Key words : Redistribution, Dehydrocoupling, Polystannane, Metallocene, Catalyst, Endocrine 1. Introduction Inorganic polymers as substitutes for organic poly-mers are very important for diverse industrial applica-tions

Redistribution/Dehydrocoupling of Endocrine n-<TEX>$Bu_3SnH$</TEX> to Polystannanes Catalyzed by Group 4 Metallocene Complexes