Affordable Access

Publisher Website

2-Oxazoline/benzoxazole-1,10-phenanthrolinylmetal (iron, cobalt or nickel) dichloride: Synthesis, characterization and their catalytic reactivity for the ethylene oligomerization

Authors
Journal
Journal of Organometallic Chemistry
0022-328X
Publisher
Elsevier
Publication Date
Volume
693
Issue
26
Identifiers
DOI: 10.1016/j.jorganchem.2008.09.046
Keywords
  • Ethylene Oligomerization
  • 2-Benzoxazole-1
  • 10-Phenanthroline
  • 2-Oxazoline-1
  • 10-Phenanthroline
  • Nickel
  • Cobalt
  • Iron
Disciplines
  • Mathematics

Abstract

Abstract Series of 2-benzoxazole-1,10-phenanthrolines ( L1– L4) and 2-oxazoline-1,10-phenanthrolines ( L5– L8) were synthesized and used as tridentate N^N^N ligands in coordinating 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 geometry, whereas cobalt complex Co1 is with a distorted bipyramidal geometry and Co3 as square pyramidal geometry. At 10 atm ethylene, all the complexes showed good activities in ethylene dimerization upon activation with appropriate aluminum cocatalysts; the nickel complexes gave the activity up to 3.11 × 10 6 g mol −1(Ni) h −1 upon activation with diethylaluminum chloride (Et 2AlCl), meanwhile the cobalt and iron complexes showed activities up to 1.51 × 10 6 g mol −1(Co) h −1 and 1.89 × 10 6 g mol −1(Fe) h −1, individually, upon activation with modified methylaluminoxane (MMAO).

There are no comments yet on this publication. Be the first to share your thoughts.