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Issue 41, 2018
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Ruthenium complexes featuring cooperative phosphine–pyridine–iminophosphorane (PNN) ligands: synthesis, reactivity and catalytic activity

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Abstract

The coordination to ruthenium(II) centres of two phosphine–pyridine–iminophosphorane ligands LR (PPh2CH2(C6H3N)CH2N[double bond, length as m-dash]PR3, R = Ph or Cy) differing by the nature of the substituent of the P[double bond, length as m-dash]N phosphorus was explored. Coordination to [RuCl2(PPh3)3] afforded the complexes [RuLRCl2(PPh3)] that were successfully deprotonated at the acidic phosphinomethyl position. With LCy, coordination led to a mixture of two isomers. The complexes [RuLRHCl(PPh3)] were similarly obtained from [RuHCl(PPh3)3]. The stability of these complexes depends on the ligand substitution pattern; with LPh a CH activation process took place, while [RuLCyHCl(PPh3)] was thermally stable. Deprotonation of this latter complex was achieved and gave a catalytically competent species for the acceptorless dehydrogenative coupling of alcohols.

Graphical abstract: Ruthenium complexes featuring cooperative phosphine–pyridine–iminophosphorane (PNN) ligands: synthesis, reactivity and catalytic activity

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Publication details

The article was received on 27 Aug 2018, accepted on 15 Sep 2018 and first published on 17 Sep 2018


Article type: Paper
DOI: 10.1039/C8DT03488E
Dalton Trans., 2018,47, 14521-14530

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    Ruthenium complexes featuring cooperative phosphine–pyridine–iminophosphorane (PNN) ligands: synthesis, reactivity and catalytic activity

    T. Cheisson, L. Mazaud and A. Auffrant, Dalton Trans., 2018, 47, 14521
    DOI: 10.1039/C8DT03488E

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