Ruthenium(II) complexes with 2,6-pyridyl-diimine ligands: synthesis, characterization and catalytic activity in epoxidation reactions

✍ Scribed by Bekir Çetinkaya; Engin Çetinkaya; Maurice Brookhart; Peter S. White

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 255 KB
• Volume: 142
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/s1381-1169(98)00285-4

✦ Synopsis

w Ž . x X Reaction of RuCl p-cymene with the tridentate N-N -N ligands, 2,6-pyridyl-diimines, led to substitution of 2 2

p-cymene. The resulting complexes, believed to be coordinatively unsaturated, exhibit efficient activity for the epoxidation Ž . of cyclohexene in the presence of iodosobenzene PhIO : the complexes formed initially take up donor molecules such as Ž . Ä w Ž acetonitrile to achieve hexacoordination. The molecular structure for one of these, acetonitrile 2,6-bis 1-4-.

x 4 Ž. methoxyphenylimino ethyl pyridine dichlororuthenium II , 2, has been determined by X-ray diffraction. The immediate Ž . Ž . coordination sphere is a distorted octahedron with trans chloride atoms and a short Ru-N py 1.906 A bond.