Synthesis of a Paramagnetic Polymer by Ring‐Opening Polymerization of a Strained [1]Vanadoarenophane

Salt-elimination reactions led to the formation of highly strained [1]bora- and [1]silavanadoarenophanes, which undergo different types of ring-opening reactions with low-valent platinum complexes. Whereas the boron-bridged derivative opened stoichiometrically by cleavage of the VCarene bond, the [1]silavanadoarenophane reacted at the SiCipso bond to afford a polymer containing spin-active metal centers in the main chain (see scheme). Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2002/2008/z800081_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.