Copper(II) complexes containing mixed β-diketone chelates

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Abstract
Copper(11) complexes of the type [CuAB]O, where A and B are the β-diketones acetylacetone (Hacac), trifluoroacetylaoetone (Htfa), hexafluorylacetylaoetone (Hhfa), thenoyltrifluoroacetone (Htta), or benzoylacetone (Hbza), have been prepared and investigated. The compounds Cu(acac)(tta), Cu(acac)(bza), Cu(tfa)(tta), Cu(tfa)(bza), Cu(hfa)(tta), Cu(hfa)(bza), and Cu(tta)(bza) are described for the first time. They have been investigated by physicochemical methods and are discussed in the light of recently reported findings on Cu(aoac)(tfa), Cu(acac)(hfa), and Cu(tfa)(hfa). However, it must be pointed out that these complexes may possibly be mixtures of mostly [CuAB]0 with slight yet equal amounts of CuA2 and CuB2.

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