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Article Dans Une Revue Dalton Transactions Année : 2018

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

Résumé

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.
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Dates et versions

hal-01999485 , version 1 (06-12-2023)

Identifiants

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Thibault Cheisson, Louis Mazaud, Audrey Auffrant. Ruthenium complexes featuring cooperative phosphine–pyridine–iminophosphorane (PNN) ligands: synthesis, reactivity and catalytic activity. Dalton Transactions, 2018, 47 (41), pp.14521-14530. ⟨10.1039/C8DT03488E⟩. ⟨hal-01999485⟩
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