Albrecht, T

Inkpen, MS

Long, NJ

White, AJP

Spiral - Imperial College Digital Repository

Complexes comprising ‘dangling’ phosphorus arms and tri(hetero)metallic butenynyl moieties

Trans-RuCl2(PP3)2 (1a) (PP3 = tris[2-(diphenylphosphino)ethyl]phosphine) was prepared by reaction of RuCl2(PPh3)3 with 2 eq. PP3. Through coordination of two potentially tetradentate ligands in a bidentate arrangement, four uncoordinated phosphine moieties remain readily available for subsequent reaction. This is demonstrated through their facile oxidation with hydrogen peroxide, providing trans-RuCl2(PP[PO]2)2 (1b) (PP[PO]2 = bis[2-(diphenylphosphine oxide)ethyl][2-(diphenylphosphino)ethyl]phosphine). Whilst chloride abstraction reactions from 1a appear slow (typical for trans dichlorides), cis-RuCl2(PP3) is shown to react rapidly with ethynylferrocene under ‘Dixneuf’ conditions (CH2Cl2, NaPF6, NEt3), providing the tri(hetero)metallic butenynyl complex [(PP3)Ru(η3–FcC3CHFc)]PF6 (2, Fc = ferrocenyl). The pendant groups of 1a-b offer great potential for future coordination studies (for example, to prepare mixed transition metal/lanthanide materials), whereby the facile synthetic route to 2 suggests a path towards examination of complex mixed-valence systems comprising multiple redox-active centres

Inkpen, M.S.

White, A.J.P.

Albrecht, T.

Long, N.J.

University of Birmingham Research Portal

Complexes comprising 'dangling' phosphorus arms and tri(hetero)metallic butenynyl moieties

Complexes comprising ‘dangling’ phosphorus arms and tri(hetero)metallic butenynyl moieties

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University of Birmingham Research Portal

University of Birmingham Research Portal

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