Spectroscopic and Biochemical Studies of Some Manganese (II ...

Spectroscopic and Biochemical Studies of Some Manganese(II), Oxovanadium(V) and Dioxomolybdenum(VI) Complexes S/O and N Donor Agents Synthesized under Microwave Conditions Transition Metal Chemistry April 2006, Volume 31, Issue 3, pp 362–367 | Cite as Rekha Garg (1) Mahesh Kumar Saini (1) Nighat Fahmi (1) R. V. Singh (1) Email author ([email protected]) 1. Department of Chemistry, University of Rajasthan, Jaipur, India Article Received: 12 October 2005 Accepted: 22 December 2005 145 Downloads 24 Citations

Abstract The synthesis of some new manganese(II), oxovanadium(V) and dioxomolybdenum(VI) complexes with 5-chloro-1,3-dihydro-3-[2-(phenyl)ethylidene]-2H-indol-2-one-hydrazinecarbothioamide (L1H) and 5-chloro-1,3-dihydro-3-[2-(phenyl)-ethylidene]-2H-indol-2-onehydrazinecarboxamide (L2H) were carried out in unimolar and bimolar ratios. All the new derivatives have been characterized by elemental analyses, molecular weight determinations, molar conductance, magnetic measurements, i.r., 1H-n.m.r. and e.s.r. studies. The i.r. and n.m.r. spectral data suggest the involvement of sulphur/oxygen and azomethine nitrogen in coordination to the central metal ion. The magnetic moment values of the manganese(II) complexes are in the 5.85–6.13 B.M. range, suggesting a high spin state in these complexes. Based on these spectral studies tetrahedral geometry for the manganese(II) complexes and octahedral geometry for the molybdenum complexes has been proposed. In the case of the oxovanadium complexes vanadium is in the penta and hexa coordinated environments. Compounds have been synthesized in an open vessel under microwave irradiation (MWI) using a domestic microwave oven. The reaction time decreases from hours to minutes with improved yield as compared to conventional heating. The free ligands and their metal complexes have been tested in vitro against a number of microorganisms in order to assess their antimicrobial properties. The results indicate that the ligands and their respective metal derivatives possess antimicrobial properties.

Keywords Manganese Antimicrobial Property Molar Conductance High Spin State Conventional Heating These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves. This is a preview of subscription content, log in to check access

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About this article Cite this article as: Garg, R., Saini, M.K., Fahmi, N. et al. Transition Met Chem (2006) 31: 362. https://doi.org/10.1007/s11243-005-0001-1 DOI (Digital Object Identifier) https://doi.org/10.1007/s11243-005-0001-1 Publisher Name Kluwer Academic Publishers Print ISSN 0340-4285 Online ISSN 1572-901X About this journal Reprints and Permissions

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