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Structure, Dynamic Behavior, and Catalytic Activity of a Novel Ruthenium Cyclopentadienyl Complex with a Tridentate P,P,O Ligand

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posted on 02.07.2002, 00:00 by Robert C. van der Drift, Elisabeth Bouwman, Eite Drent, Huub Kooijman, Anthony L. Spek, A. Bart van Oort, Wilhelmus P. Mul
Reaction of 1,2-bis(bis(o-methoxyphenyl)phosphino)ethane (o-MeO-dppe) with [RuClCp(PPh3)2] (1) at 135 °C results in the formation of (η5-cyclopentadienyl)[1-(bis(o-methoxyphenyl)phosphino-κP)-2-((o-methoxyphenyl)(o-phenolato-κO)phosphino-κP)ethane]ruthenium(II) ([RuCp(tappe)]; 3), which constitutes the first example of a ruthenium cyclopentadienyl complex with a tridentate P,P,O ligand. The X-ray structure of 3 has been determined to elucidate its solid-state structure, which shows evidence for a CH/π interaction. An NMR study corroborates this finding, and temperature-dependent 31P and 1H NMR spectra reveal the dynamic behavior of 3 in solution. Complex 3 shows catalytic activity in the isomerization of allylic alcohols to carbonyl compounds.