Abstract
Ruthenium clusters were reacted with the chelating arene ligand PPh 2(CH 2) 3Ph. First, the phosphorous atom was coordinated to Ru 6, Ru 5 and Ru 3 clusters, and the products of simple addition were fully characterised. A second (and third in the case of Ru 3) equivalent of the ligand was then successfully added to the obtained species. Attempts to coordinate the ‘dangling’ benzene ring led to a Ru 6 derivative, where a phenyl ring directly bound to the P atom reacted with the cluster, instead of the terminal one. The crystal structures of the compounds [Ru 6C(CO) 16PPh 2(CH 2) 3Ph] ( 3), [Ru 3(CO) 9{PPh 2(CH 2) 3Ph} 3] ( 9), and [Ru 6C(CO) 13PPh 2(CH 2) 3Ph] ( 10) were determined by X-ray diffraction. The former two consist of the intact cluster core with either one or three ligands bonded via the P atom, while the latter has additionally one of the phenyl rings on the phosphorous connected to the cluster in a η 6 bonding mode.
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