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Synthesis and characterization of some conjugated -ketoesters and their Cu(II) complexes

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Author Affiliations

  • 1Post Graduate and Research Department of Chemistry, MES Keveeyam College, Valanchery, Kerala-676552, India
  • 2Post Graduate Department of Chemistry, KAHM Unity Womens College, Manjeri, Kerala-676122, India

Res.J.chem.sci., Volume 10, Issue (3), Pages 25-29, October,18 (2020)

Abstract

Five conjugated b-ketoesters (HL1 to HL5) with the keto group connected to carbon-carbon double bond have been prepared through the condensation of methyl acetoacetate with aromatic aldehydes (4-nitrobenzaldehyde; 4-methoxybenzaldehyde; 3,4-dihydroxybenzaldehyde; 3,4-dimethoxybenzaldehyde and indole-3-carbaldehyde). Structural characterization by physicochemical techniques indicated the occurrence of HL1 in the keto form and HL2 to HL5 in the intra-molecularly hydrogen bonded enol form. Details on the formation and nature of bonding in the [Cu(HL)(OAc)2] complex of HL1 and [CuL2] complexes of HL2 to HL5 are confirmed by analytical and spectral techniques.

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