Abstract
ACETYLACETONE (acacH), from which the unknown chelate, dithioacetylacetone, can theoretically be obtained by substitution of two oxygen atoms with sulphur, is one of the most versatile bidentate chelates known1. In the enol form the hydroxylic proton can readily be replaced by a great many metal ions to give neutral complexes of the composition M(acac)n. The co-ordination number of the metal is usually 2n and the resulting stereochemistry is tetrahedral, square planar or octahedral, although examples of square antiprismatic and square pyramidal co-ordination are known. The bonding to the metal is invariably through the two oxygen atoms, although it has been shown2 recently that the α-carbon atom can bond to platinum in the compound trimethyl (acetylacetonyl)-2 : 2′ bipyridyl platinum (IV). Certain of the metal acetylacetonates undergo reactions characteristic of aromatic systems and these have been reviewed by Prof. Collman3.
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References
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MARTIN, R., STEWART, I. Synthesis of Transition Metal Complexes of the Unknown Chelate, Dithioacetylacetone. Nature 210, 522–523 (1966). https://doi.org/10.1038/210522a0
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DOI: https://doi.org/10.1038/210522a0
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