Abstract
The Claisen-Schmidt condensation between β-dicarbonyl compounds (benzoylacetone and acetoacetanilide) and terephthalaldehyde under specified conditions yielded a new series of conjugated tetracarbonyl compounds. Their existence in the intramolecularly hydrogen-bonded enol form (H2L) is confirmed from their IR, 1H NMR and mass spectral data. Dibasic tetradentate coordination of the compounds in their [Co2(L)2(H2O)4], [Ni2(L)2] and [Cu2(L)2] complexes is established based on analytical and spectral data.
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