502136-23-4Relevant academic research and scientific papers
Iron and cobalt complexes of a series of tridentate P,N,P ligands - Synthesis, characterization, and application in ethene polymerization reactions
Mueller, Gabi,Klinga, Martti,Leskelae, Markku,Rieger, Bernhard
, p. 2839 - 2846 (2008/10/08)
A series of tridentate P,N,P ligands comprising a central pyridine unit and two pendent diarylphosphane moieties (2,6-bis(CH2PAr2)pyridine; Ar = phenyl (1), 2-methylphenyl (2), 2,4,6-trimethylphenyl (3)) as well as the corresponding iron (1-FeCl2, 2-FeCl2, 3-FeCl2) and cobalt (1-CoCl2, 2-CoCl2, 3-CoCl2) complexes were synthesized and characterized. An X-ray structure analysis of 2-CoCl2 and 3-CoCl2 exhibited a trigonal-bipyramidal coordination geometry at the metal center, the two chlorine atoms and the nitrogen occupying the equatorial and the phosphane units the apical positions. IR analysis indicated, that in all complexes the pyridine unit is coordinated to the metal center. The cobalt compounds were applied as catalyst precursors for the polymerization of ethene after activation with MAO.
