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Abstract: A novel anilido-iminato cobalt complex [(L)Co(μ-Cl)2Li(THF)2] (1) (H(L)= o-(2′,6′- i Pr2(C6H3)–NH)(C6H4)CH(C6H3)-2,6) was synthesized by the reaction of the lithium salt of H(L) with CoCl2 in THF in 57% yield, structurally characterized by NMR and X-ray single crystal diffraction, and its application as a catalyst for the addition polymerization of norbornene in the presence of methylaluminoxane (MAO) was reported. [Copyright &y& Elsevier]

Abstract: A rare macrocyclic hexazirconium(IV) complex with bisaryloxyl N-heterocyclic carbene ligand {(L)Zr(OSiMe3)(k2-[N^O])}6 (2) ( H[N^O]=) was prepared from a mononuclear complex [(L)ZrCl2(THF)] (1). Complex 2 was structurally characterized and shows higher catalytic ethylene polymerization activities in the presence of methylaluminoxane (MAO). [Copyright &y& Elsevier]