Four 2-carboxylate-6-iminopyridines, prepared by the reaction of 2-ethylcarboxylate-6-actylpyridine with substituted anilines, reacted with FeCl2 or CoCl2 to form the title complexes. Both the ligands and complexes were characterised by elemental analysis and IR spectroscopy, and the molecular structures of Co-3 and Co-4 were determined by X-ray diffraction analysis. Activated with methylaluminoxane (MAO), these complexes showed good catalytic activity for ethylene oligomerisation with high selectivity of producing linear α-olefins.
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