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標題: Synthesis and catalytic application of aluminium anilido-pyrazolate complexes
作者: Peng, K.F.
Chen, C.T.
關鍵字: ring-opening polymerization;epsilon-caprolactone;zinc-complexes;cyclic esters;heteroscorpionate ligands;magnesium complexes;metal-complexes;lactide polymerization;coordination chemistry;cyclohexene oxide
Project: Dalton Transactions
期刊/報告no:: Dalton Transactions, Issue 44, Page(s) 9800-9806.
A series of aluminium complexes containing anilido-pyrazolate ligands is described. Reactions of four anilido-pyrazolate ligand precursors, HNPhPz, HNPh(TriMe)Pz, HNPh(OMe)Pz, or HNPh(SMe)Pz [HNPhPz = ortho-C(6)H(4)(NH-phenyl)(1-pyrazole); HNPh(TriMe)Pz = ortho-C(6)H(4)(NH-2,4,6-trimethylphenyl)(1-pyrazole); HNPh(OMe)Pz = ortho-C(6)H(4)(NH-2-methoxyphenyl)(1-pyrazole); HNPh(SMe)Pz = ortho-C(6)H(4)(NH-2-methylthiophenyl)(1-pyrazole)], with one molar equivalent of AlMe(3) in toluene give the aluminium dimethyl complexes, (NArPz)AlMe(2) [Ar = phenyl, (NPhPz)AlMe(2) (1); Ar = 2,4,6-trimethylphenyl, (NPh(TriMe)Pz)AlMe(2) (2); Ar = 2-methoxyphenyl, (NPh(OMe)Pz)AlMe(2) (3); Ar = 2-methylthiophenyl, (NPh(SMe)Pz)AlMe(2) (4)], respectively. The molecular structures are reported for compounds 1 and 3. Their catalytic activities toward the ring opening polymerisation reaction of e-caprolactone in the presence of BnOH are also under investigation.
ISSN: 1477-9226
DOI: 10.1039/b905394h
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