Mono- and di-nuclear nickel(II) complexes bearing 3-aryliminomethyl-2-hydroxybenzaldehydes: Synthesis, structures and vinyl polymerization of norbornene

Neutral Nickel Catalysts for Olefin Homo- and Copolymerization: Relationships between Catalyst Structures and Catalytic Properties

“…229 The reaction of tridentate ligands with NiCl 2 •H 2 O affords bis-ligated complexes 101 and 102, which show catalytic activities up to 9.88 × 10 7 g PNB/mol Ni •h in the presence of MAO. 230 Apart from phenoxy−imine complexes, bis(β-ketoamino) nickel complexes 103−105 in combination with MAO or MMAO are also active for NBE polymerization. 225,231−233 Moreover, some novel bis-ligated nickel complexes bearing phenoxy−imidazole (106), 234 aryloxide−N-heterocyclic carbene (107), 235 and carborane [S,C] or [S,S] (108a,b) 236 ligands are also capable of polymerizing NBE (Chart 25).…”

“…The steric bulk of the N -aryl group does not substantially affect the catalytic behavior and the characteristics of the resultant PNBs . The reaction of tridentate ligands with NiCl 2 ·H 2 O affords bis-ligated complexes 101 and 102 , which show catalytic activities up to 9.88 × 10 7 g PNB/mol Ni ·h in the presence of MAO …”

Synthesis of well defined C–C bridged Ni(ii) complexes bearing β-ketoiminato-fluorene ligands by bifluorenyl in situ coupling and application for norbornene (co)polymerization

“…16 In general, these nickel(II) complexes mainly adopt one bidentate neutral ligand or monoanionic ligand such as [NN] type (e.g., anilido-imine, benzamidinato, b-diketiminato, diimine, imino-pyrrolylato, benzimidazole, bipyridine, a-dioxime), [NO] type (e.g., b-ketoiminato, b-diketonato, salicylaldiminato, acylhydrazone, indanimine). [17][18][19][20][21][22] Due to the signicance and versatility of the ligands in the homogeneous olen polymerization nickel(II) catalysts, the design of the pre-catalysts is mainly focused on the design and modication of the ligand itself. We have had a longstanding interest in bis(b-ketoiminato)-based catalysts of olen polymerization, [23][24][25][26] due to the remarkable simplicity of ligand synthesis and rich opportunities for netuning of its steric and electronic properties by the introduction of substituent into the phenyl rings of the b-ketoiminato ligand.…”

Probing the Characteristics of Mono- or Bimetallic (Iron or Cobalt) Complexes Bearing 2,4-Bis(6-iminopyridin-2-yl)-3H-benzazepines: Synthesis, Characterization, and Ethylene Reactivity

“…Binuclear complexes in catalysis are of interest due to potential synergistic effects . Some attention has been paid to bimetallic complex precatalysts for ethylene reactivity, and recently this was discussed in a review article .…”