title: Neutral tridentate PNP ligands and their hybrid analogues: versatile non-innocent scaffolds for homogeneous catalysis.
abstract: Ligands in coordination chemistry and homogeneous catalysis are traditionally "static" spectators that do not actively participate in the catalytic cycle. However, such classic systems do not provide additional "handles" that could facilitate or trigger alternative productive reaction pathways. Recent advances in the use of novel nitrogen-centered pincer systems have unveiled interesting opportunities for cooperative catalysis. The chemistry of pyridine-derived, neutral ligands is discussed, with a specific focus on their non-innocent behavior and potential as facilitators for metal-mediated organic transformations. This overview should provide inspiration and an incentive to incorporate non-innocent ligands and their metal complexes within old and new homogeneously catalyzed reactions.
authors.affiliation: Supramolecular & Homogeneous Catalysis Group, van't Hoff Institute for Molecular Sciences, University of Amsterdam, Nieuwe Achtergracht 166, 1018 WV Amsterdam, The Netherlands. j.i.vandervlugt@uva.nl
authors.forename: Jarl Ivar
authors.initials: JI
authors.lastname: van der Vlugt
authors.forename: Joost N H
authors.initials: JN
authors.lastname: Reek
mesh_terms: D002384:Catalysis; D008024:Ligands; D008670:Metals / Q000737:chemistry; D010720:Phosphines / Q000737:chemistry; D010758:Phosphorus / Q000737:chemistry; D011725:Pyridines / Q000138:chemical synthesis / Q000737:chemistry*; D012428:Ruthenium / Q000737:chemistry
chemical_list: D008024:Ligands; D008670:Metals; D010720:Phosphines; D011725:Pyridines; D010758:Phosphorus; D012428:Ruthenium