Synthesis, structural characterization and ethylene polymerization behavior of complex [Ph4P][CrCl3{HB(pz)3}] [HB(pz)3 = hydrotris(1-pyrazolyl)borate] |
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| Authors: | Ren Rojas Mauricio Valderrama Guang Wu |
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| Affiliation: | aDepartamento de Química Inorgánica, Facultad de Química, Pontificia Universidad Católica de Chile, Av. Vicua Mackenna 4860, Casilla 306, Santiago-22, Chile;bDepartment of Chemistry and Biochemistry, University of California, Santa Barbara, CA 93106, USA |
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| Abstract: | Reaction of CrCl3(THF)3 with KHB(pz)3] in THF leads to the formation of the complex KCrCl3{HB(pz)3}] (1). The salt metathesis of complex 1 with Ph4P]Br in CH2Cl2 yields the complex Ph4P]CrCl3{HB(pz)3}](2). The structure of complex 2 · CHCl3 has been determined by single crystal X-ray diffraction. In the anion the metal centre shows a distorted octahedral geometry with the hydrotris(1-pyrazolyl)borate bonded as N,N′,N″-donor tripod ligand and three chloride atoms completing the co-ordination sphere. Complex 2 in the presence of MAO leads to the formation of an active catalyst for the polymerization of ethylene. |
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| Keywords: | Chromium Hydrotris(1-pyrazolyl)borate complexes Ethylene polymerization Synthesis |
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