Synthesis, Characterization, Electrochemical and Anitmicrobial Studies of Manganese(IV) Complexes Derived from Polyfunctional Glutaryldihydrazone

P. Sarma1,, P. Mahanta1,, D. Basumatary1,*, and C. Medhi2,

1Department of Applied Sciences, Gauhati University, Guwahati-781014, India

2Department of Chemistry, Gauhati University, Guwahati-781014, India

*Corresponding author: Tel: +91 361 2570412; E-mail: debbasumatary@gmail.com; debbasumatary@gauhati.ac.in

Abstract

The synthesis and structure elucidation of a new series of manganese(IV) complexes from disalicylaldehyde glutaryldihydrazone (slghH4) of the composition [MnIV(slgh)](A)2]·H2O and [MnIV(slgh)(NN)] (where A= H2O, (1); pyridine, (2); 2-picoline, (3); 3-picoline, (4); 4-picoline, (5) and NN = 2,2′-bipyridine, (6); 1,10-phenanthroline, (7)) were carried out. The composition and structures of all the complexes of Mn(IV) have been evaluated by elemental analysis, thermal studies, molar conductance, mass spectral data, magnetic moment, electronic, electron paramagnetic resonance and infrared spectral studies. Molar conductances of these Mn(IV) complexes suggest their non-electrolytic nature. Magnetic moment and EPR studies suggested that the Mn(IV) ions are six-coordinated octahedral geometry around the metal ions. The IR spectral studies confirmed that the ligand coordinates to the Mn(IV) ion in enolic form and behave as a tetradentate ligand in anti-cis configuration chelating Mn(IV) ion with NNOO coordination sites. The electrochemical and antimicrobial studies of the Mn(IV) complexes have also been carried out.

Keywords

Disalicylaldehyde glutaryldihydrazone, Manganese(IV), Stereochemistry, Redox activity, Antimicrobial activity.

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