Metal complexes of unsaturated polycarbonyl compounds derived from benzoyl acetone and aromatic aldehydes

Subject Areas : Journal of the Iranian Chemical Research

Muhammed Basheer Ummathur ¹ (Department of Chemistry, Unity Women’s College, Manjeri, Kerala-676122, India)
Anjali Krishnan ² (Department of Chemistry, Unity Women’s College, Manjeri, Kerala-676122, India)
Mathew Ukken ³ (Department of Chemistry, Christ College, Irinjalakuda, Kerala-680125, India)

Received: 2009-03-26 Accepted : 2009-11-25 Published : 2010-12-31

Keywords: Unsaturated β-diketones, Metal complexes, IR spectra, 1H NMR, Mass,

Abstract :

Condensation of aromatic aldehydes with benzoyl acetone under specified conditions yieldedtwo series of polycarbonyl compounds in which the keto group is attached to olefinic linkage.Spectral and analytical data revealed the formation of an unsaturated triketone from pyridine-3-carbaldehyde and unsaturated diketone from furfural, salicylaldehyde and 2-hydroxynaphthaldehyde. Analytical, IR, 1H NMR and mass spectral data suggest neutralbidentate coordination for the unsaturated triketone with Ni(II), Cu(II) and Zn(II) ions. In the[ML2] complexes of the unsaturated diketones, the intramolecularly hydrogen bonded enolproton is replaced by the metal ion.

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