Synthesis of novel zirconium complexes bearing mono‐Cp and tridentate Schiff base [ONO] ligands and their catalytic activities for olefin polymerization

FI Catalysts for Olefin Polymerization—A Comprehensive Treatment

“…Most of the tridentate phenoxy−imine ligands synthesized so far possess an extra donor atom on R 1 , and therefore, primary amines with an extra donor would be an essential starting material. Examples include pyridin-2-ylmethanamine, ,,− quinolin-8-amine, ,,, and N , N -dimethylethylenediamine as N-containing primary amines; 2-phenoxyaniline ,− and 2-methoxyaniline ,− as O-containing primary amines; 2-aminothiophenol ,, as S-containing primary amines; and 2-diphenylphosphinoaniline ,,, as P-containing primary amines. Additionally, 9-aminofluorene, amino acids, and 2-aminomethyl-1-methylbenzimidazole dihydrochloride were also employed as a primary amine possessing an extra coordinating donor.…”

Dinuclear Zn(II) and tetranuclear Co(II) complexes of a tetradentate N2O2 Schiff base ligand: Synthesis, crystal structure, characterization, DFT studies, cytotoxicity evaluation, and catalytic activity toward benzyl alcohol oxidation

“…Schiff base ligands are prepared easily and can be readily modified, both electronically and sterically . Schiff base ligands contain multiple potential donor sites, which allow them to bind metal ions with diverse coordination geometries such as bidentate and tridentate . Tetradentate Schiff base ligands also provide a suitable coordination platform for metal ions to provide diverse metallic complexes …”

Mixed ligands supported yttrium alkyl complexes:

“…Meanwhile, multidentate non-Cp ligands have also attracted increasing attention, since these ligands could provide proper steric and electronic environment for compensating coordinative unsaturation of metal centers [6][7][8][9][10][11]. Comparatively, rare earth metal complexes bearing mixed Cp/non-Cp ligands have been less exploited, however, they have received considerable attention recently due to the merits of the combined ligands [12,13]. For instance, mixed Cp * /bipyridine supported lutetium complexes reported by Cameron et al reacted with carbon monoxide leading to interesting intramolecular C-H activation of the bipyridine ligand [12].…”