Synthesis, Characterization and Biological Analysis of Some Novel Complexes of Phenyl Thiourea Derivatives with Copper

Abstract

Introduction: Copper is a very important metal because all forms of life require copper metals an essential micronutrient. Various biological processes, directly or indirectly are dependent on copper metal. Methods: Copper soaps are used as fungicides, bacteriosides, herbicides and insecticides. Copper complexes including heterocyclic compounds have attracted our attention in a magnificent way because of its utility in catalysis and biological functions. Their mechanism of synthesis, characterization and structural insight, are crucial for comprehending the criteria of the bonding and electronic interactions between the proximate metal center and chelating atoms. But still, there is a need to explore some of more biological properties for their wide applicability and significant usage in multiple fields because it is an untapped area with potentially tremendous value. Hence, in this paper, we report the synthesis and characterization of transition metal complex of N/S ligand by chromatographic, FT-IR, NMR, ESR, elemental analysis, conductometric and magnetic moment measurements. Results: The synthesized metal complexes namely copper palmitate with 4-nitrophenylthiourea and copper palmitate with 4-methoxyphenylthiourea were successfully investigated for biological activities against fungi Candida albicans and Trichoderma harzinum. Based on the results, we pronounced biocidal activities of the novel complexes. Conclusion: It is concluded that the activity of nitro phenylthiourea complex has greater antifungal activity than methoxy phenylthiourea complex against these test fungi. We can conclude that the antifungal activity of these complexes varies according to the nature of the groups attached to the ligands.

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“…Cr (III): the first transition υ1 taken from the IR spectrum and found to be 3438 cm -1 Scheme 3 (b) Spectrum of Cr (III) complex olive color (CrL) showed three absorption bands at 820, 670, and 460 nm (12195,14925 and 21739) cm -1 were assigned to 4 A2g → 4 T2g, 4 A2g(F)→ 4 T1g and 4 A2g(F)→ 4 A2g transitions. The magnetic moment was 3.8 BM, suggesting an octahedral geometry 24 .…”