Synthesis, spectroscopic and X-ray crystal studies of mixed-chelate copper(II) complexes containing a novel β-diketonate ligand

Y. Y. Lim, W. Chen, L. L. Tan, K. H. Lim

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Abstract

Mixed-chelate copper(II) complexes, [CuL(tmed)]X (where L = a β-diketonate derived from 2,4-diacetyl-5-hydroxy-5-methyl-3-phenylcyclohexanone, timed = N,N,N′, N′-tetramethylethylenediamine and X = NO3 or BPh4) were prepared and studied by conductivity (NO3 only), UV-vis and ESR techniques. The crystal structure of the nitrate complex was determined by X-ray diffraction. It consists of a mononuclear square-panar copper(II) complex cation and a nitrate counterion which is not coordinated to copper. The rate enhancement effects of [CuL(tmed)]NO3 on the autooxidation of 3,5-di-tert-butylcatechol in acidic solutions are compared with those of other similar copper(II) complexes.

Original languageEnglish
Pages (from-to)2379-2385
Number of pages7
JournalPolyhedron
Volume13
Issue number15-16
DOIs
Publication statusPublished - Aug 1994
Externally publishedYes

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