Synthesis and Characterization of í3-è2,è2,è2-C60 Trirhenium Hydrido Cluster Complexes

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dc.contributor.authorSong, Hyunjoon-
dc.contributor.authorLee, Yumi-
dc.contributor.authorChoi, Zel-Ho-
dc.contributor.authorLee, Kwangyeol-
dc.contributor.authorPark, Joon T.-
dc.contributor.authorKwak, Juhyoun-
dc.contributor.authorChoi, Moon-Gun-
dc.identifier.citationOrganometallics, Vol.20, pp.3139-3144en
dc.description.abstractThe reaction of C60 with Re3(μ-H)3(CO)11(NCMe) in refluxing chlorobenzene produces Re3(μ-H)3(CO)9(μ3-η2,η2,η2-C60) (1) in 50% yield. Initial decarbonylation of 1 with Me3NO/MeCN followed by reaction with PPh3 in boiling chlorobenzene affords Re3(μ-H)3(CO)8(PPh3)(μ3-η2,η2,η2-C60) (2) in a low yield (26%). Treatment of 1 with PhCH2NPPh3 at room temperature gives a benzyl isocyanide substituted product Re3(μ-H)3(CO)8(CNCH2Ph)(μ3-η2,η2,η2-C60) (3) in 53% yield. Compounds 1, 2, and 3 have been isolated as crystalline solids and characterized by spectroscopic (infrared, mass, 1H, 31P, and 13C NMR) and analytical data. The structure of 3 has been determined by a single-crystal X-ray diffraction study. The C60 ligand is coordinated to the trirhenium triangle in a μ3-η2,η2,η2 bonding mode, and the benzyl isocyanide ligand occupies an axial position of a rhenium atom. Electrochemical properties of 1 and 2 have been studied by cyclic voltammetry (CV) in chlorobenzene (CB) solutions. The general features of CV curves have revealed four reversible redox couples for 1 and 2 in the CB potential window. The CV results suggest that a C60-mediated electron transfer to the trirhenium center takes place in 12- species for 1 and 23- for 2.en
dc.description.sponsorshipThis work was supported by the National Research Laboratory (NRL) Program of the Korean Ministry of Science & Technology (MOST) and the Korea Science Engineering Foundation (Project No. 1999-1-122-001-5).en
dc.publisherAmerican Chemical Societyen
dc.titleSynthesis and Characterization of í3-è2,è2,è2-C60 Trirhenium Hydrido Cluster Complexesen
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