Abstract
The new ether-phosphine ligand (oxetanyl-2-methyl)diphenylphosphine (1) with strongly basic properties is obtained by reaction of LiPPh2 with 2-chloromethyloxetane. Reaction of 1 with Cl2Ru(PPh3)3 results in the formation of the bis(chelate) complex trans-Cl2Ru(P~O)2 (2). (P∼O = η1-P-coordinated; P~O = η/2-O,P-coordinated). With CO only one Ru-O bond is cleaved to give the monocarbonylruthenium(II) complex trans-Cl2Ru(CO)(P∼O)(P~O) (3). 3 shows fluxional behaviour only at higher temperatures as demonstrated by 31P{1H} NMR spectra.
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