Modification structure of chalcone compounds and synthesis of their nickel(II) and copper (II) complexes

Chua, Rose Siaw Chin (2012) Modification structure of chalcone compounds and synthesis of their nickel(II) and copper (II) complexes. [Final Year Project Report] (Unpublished)

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Abstract

Four bis-chalcone compounds with different para- or ortho-substituted were synthesised by Claisen-Schmidt condensation of terephthaladehyde and para- or ortho-substituted Racetophenone under base condition. These bis-chalcone were used as the ligands for synthesising their nickel(II) and copper(II) complexes. All the synthesised bis-chalcones and their complexes were characterised by IR, 1H NMR, and UV-Vis spectroscopy. The spectra data showed that the introducing of different para- or ortho-substituents on the aromatic rings have a great influenced on the carbonyl group, vinylic protons, and charge transfer within the whole molecule of bis-chalcones. The comparison of the IR spectra of the bis-chalcones and their metal complexes indicated that only the bis-chalcone with the hydroxyl substituent was successfully coordinated to nickel(II) ion in 1:1 molar ratio to form the complex through the oxygen atoms of the carbonyl and phenolic group.

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