“…Exemplary reactions that make use of 1,3-P,N ligands are the Ru-catalyzed hydration of nitriles, ,, the Pd-catalyzed carbonylation of alkynes, ,, Pd-catalyzed Buchwald–Hartwig and Suzuki–Miyaura cross-coupling reactions, dinuclear Pd- and [Fe-Rh]-catalyzed carbonylation of alcohols, ,, the Ru- and Au-catalyzed hydration of alkynes, , the Ru-catalyzed transfer hydrogenation of ketones and aldehydes, , the Ru-catalyzed isomerization of alkenes, the Ru-catalyzed and dinuclear Rh-catalyzed hydrogenation of alkenes, , the Rh-, Ir-, and [Ru–Rh]-catalyzed hydroformylation of alkenes, ,, and the Cr-catalyzed tri- and tetramerization of ethylene, whereas Cu I 2 and [Au I 3 -Ag I ] complexes have been used in photoluminescence. ,, A popular ligand in the complexes used for these reactions is 2-pyridyldiphenylphosphane (PyPPh 2 ), , even though it has limited flexibility for steric and electronic tuning of particularly the N-donor site. Replacement of the pyridine group by an imine or amine functionality provides 1,3-P,N ligands with more opportunities to tune the properties of their derived catalysts.…”