Study On Synthesis And Properties Of Half-Sandwich Ruthenium Complexes

Half-sandwich structure of metal ruthenium complexes have rich chemical and physical properties,good thermal stability and rich reactivity,it has gradually become one of the hot research directions of coordination chemistry and organometallic chemistry.In this paper,two kinds of N,O-coordination half-sandwich ruthenium complexes were synthesized from different nitrogen-containing ligands and their catalytic properties were investigated.The main work is as follows:1.Four kinds of half-sandwich ruthenium complexes with N,O-coordination patterns were prepared using hydroxylindenone-imine as ligands.The ruthenium complex has excellent catalytic activity in the synthesis of quinoline and tetrahydroquinoline derivatives by the oxidative cyclization of aminoalcohols and ketones under the condition of low equivalent use of catalyst.These complexes have been characterized by NMR,elemental analysis and infrared spectroscopy.2.A series of 1-indanone ligands were prepared based on the reaction of1-dihydroninhydrin with anilines of different substituents.The ligands were reacted with[Cym Ru Cl₂]₂ to synthesize a series of N,O-coordination half-sandwich ruthenium complexes.Using cheap and less toxic HCOOH or clean H₂ as hydrogen source,the complex can effectively realize the reductive amination reaction of aldehydes and amines.The reaction showed good substrate scope,mild conditions and high products yields.