Rings, Polymers, and New Materials Containing Phosphorus and Other Main Group Main Elements or Transition Metals

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Abstract
Polymers which contain inorganic elements are attracting considerable attention because they provide access to materials with interesting, unusual and potentially useful properties. In this paper we emphasize some of our recent work aimed at exploiting ring-opening polymerization as a route to new inorganic and organometallic polymers containing the main group element phosphorus. For example, attempts to prepare new polymers which also contain boron are reported. In addition, recent results on the ring-opening polymerization of [1]- metallocenophanes such as cyclic ferrocenylsilanes and cyclic ferrocenylphosphines, which possess strained ring-tilted structures, are described. Finally, some recent research on poly(thionylphosphazenes), a novel class of inorganic polymers with sulphur(VI)-nitrogen-phosphorus backbones, is discussed.