P. Braunstein, C. Graiff, Fr'ed'eric Naud
Sep 8, 2000
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0
Influential Citations
34
Citations
Journal
Inorganic Chemistry
Abstract
A series of new Ru(II) complexes containing two chelating P,N ligands of the type (2-oxazolin-2-ylmethyl)diphenylphosphine (PCH2-oxazoline I), (2-oxazolin-4,4-dimethyl-2-ylmethyl)diphenylphosphine (PCH2-oxazoline-Me2 II), and (2-oxazolin-4-(S)-isopropyl-ylmethyl)diphenylphosphine (PCH2-oxazoline-iPr III) have been prepared and characterized by IR, 1H, 13C{1H}, and 31P{1H} NMR spectroscopy and by X-ray diffraction studies in the cases of cis,cis,cis-[RuCl2(PCH2-oxazoline)2] (1) and cis,cis,trans-[RuCl2(PCH2-oxazoline-Me2)2] (3). Four different types of octahedral coordination geometries are found for these complexes depending on the ligand. With I, cis,cis,cis and trans,trans,trans geometries were characterized in complexes 1 and 2, respectively, whereas with ligand II only the cis,cis,trans isomer 3 was formed. Reaction of the enantiomerically pure ligand III with [RuCl2(COD)]n afforded a mixture of isomers, and complex trans,cis,cis-[RuCl2(PCH2-oxazoline-iPr)2] 4 was fully characterized. This complex was...