1,1′-Bis(dipyrrolylphosphino)ferrocene: Synthesis, coordination chemistry and structural studies

Abstract

A new ferrocenyl-bisphosphine, 1,1′-bis(dipyrrolylphosphino)ferrocene (dpypf) (1) was synthesized by the reaction of [Fe(C5H4PCl2)2] with lithiated pyrrole at −78 °C. The bis(selenide) [Fe{C5H4P(Se)(NC4H4)2}2] (2) and tetracarbonyl derivatives [M(CO)4(dpypf)] (3, M = Mo; 4, M = W) were synthesized by reacting 1 with elemental selenium and [M(C5H11N)2(CO)4] (M = Mo, W), respectively. The reaction of 1 with [Ru(η6-p-cymene)Cl2]2 in 1:2 molar ratio yielded the dinuclear complex [{Ru(η6-p-cymene)Cl2}2(μ-dpypf)] (5), whereas the reaction with [CpRu(PPh3)2Cl] in 1:1 molar ratio produced a chelate complex [CpRuCl(dpypf)] (6). The reactions of 1 with M(COD)Cl2 (M = Pd, Pt) yielded chelate complexes, [MCl2(dpypf)] (7, M = Pd, 8, M = Pt). Treatment of 1 with AgOTf in 1:1 molar ratio gave a dinuclear complex [Ag(μ-OTf)(dpypf)]2 (9). Gold complex [Au2Cl2(μ-dpypf)] (10) was obtained by reacting 1 with two equivalents of [AuCl(SMe2)]. Crystal structures of 2–4 and 6–10 were established by single-crystal X-ray diffraction studies.