Bis(benzimidazolyl, benzothiazolyl, and benzoxazolyl)benzene complexes as catalysts for ethylene polymerization

Ti (IV) Complexes of Some Heterocyclic Ligands Synthesis, Characterization and Ethylene Polymerization Activity

“…The vanadium complexes of bis(benzimidazole)amine tridentate ligands [N, N, N], were reported as active ethylene polymerization catalysts after activation with simple alkylaluminum compounds 31 2,6-Bis(2-benzimidazolyl)pyridine zirconium dichloride / MAO polymerizes methylacrylate 32 Recently, [33][34][35][36][37][38][39] we reported the ethylene polymerization activity of benzimidazole, benzothiazole, benzoxazole and 2-(benzimidazolyl) pyridine titanium zirconium and vanadium complexes. Herein we report on the effect of hetero atom on the activity of zirconium, complexes of bis (benzimidazole), benzothiazole, and benzoxazole), and their behaviour towards ethylene polymerization after activation with methylaluminoxane (MAO).…”

Bis(benzothiazolyl) titanium, zirconium and vanadium complexes as catalysts for ethylene polymerization

“…methylacrylate [19]. We have shown recently [20][21][22] that bis (benzimidazolyl, benzothiazolyl, and benzoxazolyl) benzene complexes of titanium, zirconium and vanadium can be activated with methylalumoxane and then be applied as attractive catalysts for ethylene polymerization. Herein we report the first zirconium, titanium and vanadium complexes of 1,2-bis(ben zothiazolyl)benzene, 1,2-bis(benzothiazolyl)ethane, 1,1-bis(benzothiazolyl)methane, and 2,6-bis(benzothiazolyl) pyridine.…”

Mononuclear complexes with heterocyclic ligands as ethylene polymerization catalysts for single-reactor bimodal polyethylene technology

“…1,2-Bis-benzimidazoles and 2,6-bis(benzimidazolyl) pyridine are well known ligand precursors for transition metal complexes [14][15][16][17][18][19][20][21][22][23][24]. So far, for ethylene polymerization, 1,2-bis(benzimidazolyl) benzene copper [25], titanium, zirconium and vanadium complexes were reported [26][27][28] that can be activated with methyalumoxane (MAO) and then be applied successfully for catalytic ethylene polymerization. The vanadium complexes of bis(benzimidazole) amine tridentate ligands [N,N,N], are active ethylene polymerization catalysts after activation with alkylaluminum compounds [29] and 2,6-bis(2-benzimidazolyl) pyridine zirconium dichloride / MAO polymerizes methylacrylate [30].…”