Synthesis of dialkyl, diaryl and metallacyclic complexes of Ni and Pd containing pyridine, α-diimines and other nitrogen ligands

Olefin oligomerization, homopolymerization and copolymerization by late transition metals supported by (imino)pyridine ligands

“…Ni II -dialkyl iminopyridinate complexes have been also conveniently prepared in high yelds by ligand exchange reactions starting from NiR 2 Py 2 precursors [73]. The coordination geometry at the nickel center is quite flexible, varying from trigonal-bipyramidal to tetrahedral with various degrees of distortion from the idealized geometries, depending on the substitution pattern of the pyridine ring.…”

“…Pd II complexes containing (imino)pyridine ligands are mononuclear, diamagnetic yellow-orange solids with a nearly ideal square-planar coordination geometry [14,15,23,26,30,44,45,53,60,73,76,77] (Fig. 6).…”

Iron-catalyzed intramolecular cyclotrimerization of triynes to annulated benzenes

“…[11] Other ligands 4a,b [11], 4c-e [12], 4f [13] and 6a-c [14] were prepared according to the reported procedure. The alkyne substrates were prepared by the conventional reactions.…”

“…A series of 1,2-diimines 4 could act as a good ligand in a nearly stoichiometric amount to FeCl 3 , where it was again observed that 4 with bulky N-substituents was a preferable ligand (entries [9][10][11][12][13][14]. 4,5,4',2']bioxazolyl (4f) was also a good ligand (entry 15).…”

A Protocol for Safe Lithiation Reactions Using Organolithium Reagents

“…Beyond acid-base chemistry, alkyllithium reagents have been exploited in inorganic and organometallic chemistry as a means to provide carbonbased ligands 11,12 , transmetallate reagents in catalysis [13][14][15] , or facilitate organometallic reactivity by photolytic M-Me bond homolysis 16,17 . While alkyllithium reagents are thermodynamically very strong bases, their reactivity can be sluggish in some reactions, requiring optimization of reaction conditions 18 .…”