Novel Ferrocene Derivatives with PH-Functionalized Phosphanylalkylcyclopentadienyl Ligands: Syntheses and Molecular Structures ofrac-[Fe{(η5-C5H4)CMe2PHR}2] (R = Ph, Mes) andrac-[Fe{(η5-C5H4)CMe2PHPh(Cp*TaCl4)}2]

Abstract

6,6-Dimethylfulvene reacts with LiPHMes (Mes = 2,4,6-Me3C6H2) to give Li[(C5H4)CMe2PHMes] (1). The ferrocene derivatives rac-[Fe{(η5-C5H4)CMe2PHR}2] [R = Ph (2), Mes (3)] are obtained in high yield from the lithium reagents Li[(C5H4)CMe2PHR] (R = Ph, Mes) and FeCl2. Compound 2 reacts with [Cp*TaCl4] to give the heterotrinuclear complex rac-[Fe{(η5-C5H4)CMe2PHPh(Cp*TaCl4)}2] (4). Compounds 1−4 were characterized spectroscopically, and crystal structure determinations were carried out on 2−4. (© Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002)