Chromium(III) complexes bearing 2-benzazole-1,10-phenanthrolines: synthesis, molecular structures and ethylene oligomerization and polymerization
作者:Min Zhang、Kefeng Wang、Wen-Hua Sun
DOI:10.1039/b902361e
日期:——
group shows regular influence on the 10Dq values as 10Dq (O) > 10Dq (N) > 10Dq (S), which reflects the σ-donor/π-acceptor properties of these benzazole ligands. Upon activation with modified methylaluminoxane (MMAO), these complexes exhibited high activities for ethylene oligomerization (up to 7.36 × 106 g mol−1 (Cr) h−1) and ethylenepolymerization (up to 1.28 × 106 g mol−1 (Cr) h−1). The effects of
2-Oxazoline/benzoxazole-1,10-phenanthrolinylmetal (iron, cobalt or nickel) dichloride: Synthesis, characterization and their catalytic reactivity for the ethylene oligomerization
作者:Min Zhang、Rong Gao、Xiang Hao、Wen-Hua Sun
DOI:10.1016/j.jorganchem.2008.09.046
日期:2008.12
with metal (nickel, cobalt or iron) chlorides. Their metal complexes, nickel(II) (Ni1–Ni8), cobalt(II) (Co1–Co8) and iron(II) (Fe1–Fe8), were characterized by elemental and IR spectroscopic analyses. The molecular structures of the ligand L2 and the complexes Ni3, Co1, Co3 and Fe2 have been determined by the single-crystal crystallography. The nickel complex Ni3 and iron complex Fe2 display an octahedral