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Abstract

The development of processable high molecular weight polymers with skeletal transition metal atoms represents a synthetic challenge that, if overcome, can be expected to yield a variety of materials with novel electrical, optical, magnetic, or preceramic properties. Recent work has shown that the ringopening polymerization (ROP) of strained, ring-tilted [11]- or [2] metallocenophanes provides a route to a variety of welldefined, ferrocene-backbone polymers with molecular weights of over 1000000 in several cases.