Daniel A. Foucher

A highly strained heterocyclosiloxane: synthesis and X-ray crystal structure of pentaphenylboracyclotrisiloxane BSi2O3Ph5

Abstract The first X-ray structure determination of a neutral, uncomplexed molecular cyclotrisiloxane in which a skeletal silicon atom has been replaced by an atom of a heteroelement shows that BSi 2 O 3 Ph 5 possesses a highly strained six-membered ring with considerable bond angle distortion.

Novel ceramic and organometallic depolymerization products from poly(ferrocenylsilanes) via pyrolysis

When heated at 500 °C under nitrogen the poly(ferrocenylsilanes)[Fe(η-C5H4)2(SiR2)]n(1; R = Me, or 2; R = Ph) yield magnetic iron silicon carbide ceramics together with a orange–yellow sublimate which, in the case of 1, was shown to contain the unusual unsymmetrical dimer [Fe(η-C5H4)2(µ-SiMe2)2(η-C5H3)Fe(η-C5H5)]3 by single crystal X-ray diffraction.

The Pyrolysis of Poly(Ferrocenylsilanes): Metal Containing Ceramics and Small Molecules

Abstract High molecular weight poly(ferrocenylsilanes) have been pyrolyzed under nitrogen, air and in vacuum to yield magnetic ceramics and interesting small molecule products. The characteristics of the materials produced in these reactions is discussed.

Ring-Opening Polymerization (ROP) of Strained Metallocenophanes

Synthetic organic polymers are predominantly based on chains of carbon atoms and have tremendous technological utility. The presence of transition metal elements in the main chain of a polymer is expected to lead to macromolecules which combine processability with novel physical or catalytic properties. To date the preparation of transition metal-based polymers in which the metal atoms are held in close proximity so as to promote interactions has been dominated by synthetic problems and examples of soluble, well-defined, and well-characterized materials of reasonable molecular weight (Mn > 104) are very rare.1