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Updated: Feb 4, 2026

The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
Published on: April 10, 2015
Ruthenium complexes featuring cooperative phosphine-pyridine-iminophosphorane (PNN) ligands: synthesis, reactivity
Thibault Cheisson1, Louis Mazaud, Audrey Auffrant
1LCM, CNRS-Ecole polytechnique, Université Paris-Saclay, F-91128 Palaiseau Cedex, France. audrey.auffrant@polytechnique.edu.
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.
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