Synthesis, Characterization, and Electrochemical Properties of Mono-, Di-, and Trinuclear Transition Metal Fullerene Complexes Containing Diphosphine Cis-Ph2PCH=CHPPh2 Ligand
New transition metal fullerene complexes containing cis-Ph2PCH=CHPPh2 (dppet) ligand have been investigated. The mononuclear complexes (η 2-C60)M(cis-dppet) (1, 2; M = Pd, Pt) were prepared by reaction of C60 with M(dba)2 (dba = dibenzylideneacetone) followed by treatment with cis-dppet, while the in situ prepared 1 and 2 reacted with M1(PPh3)4 to afford dinuclear complexes (η 2 : η 2-C60)M(cis-dppet)M1(PPh3)2 (3–6; M, M1 = Pd, Pt). Similarly, trinuclear complexes (η 2 : η 2-C60) M(cis-dppet)M1(dppr) (7–10; M, M1 = Pd, Pt; dppr = (eta; 5-Ph2PC5H4)2Ru) could be synthesized by reaction of the in situ prepared 3–6 with dppr. 1–10 were characterized by elemental analysis and spectroscopy. Cyclic voltammetric studies on 2 (M = Pt), 3 (M = Pd, M1 = Pd) and 9 (M = Pt, M1 = Pd) provided further evidence for the &eta 2-coordination of C60 to one metal fragment or two metal fragments in these complexes.
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Document Type: Research Article
Publication date: April 1, 2007
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