Assignment of the structure of a Ru(II)–BINAP catalyst

Abstract Ruthenium–BINAP catalysts are commonly used in asymmetric hydrogenations and provides high enantioselectivity over a wide range of substrates. Herein we focus on a single Ru(II)–BINAP catalyst prepared from cyclooctadienyl ruthenium dichloride and ( R )-BINAP in the presence of triethylamine and report on the structure identified using NMR as the diethylammonium salt [(C 2 H 5 ) 2 NH 2 ] + [Ru 2 Cl 5 ((R)-BINAP) 2 ] − .