Dioxomolybdenum(VI) and oxovanadium(IV) organo-complexes of tartrato-dihydrazone ligand as reactive antitumor and antimicrobial agents. ctDNA interactive nature

Abstract

Form the condensed > C = O of salicyldehyde with -NH2 of tartric dihydrazide, a new chelating bis-tridentate tartrato-dihydrazone ligand (HTL) was constructed. Due to the high applicability of metal aryl/aroyl-hydrazone complexes, its ligational behavior versus two high valent dioxo/oxo-metal ions of MoO22+ and VO2+ ions was explored to build up two new organo-dimetallic complexes (MoO2TL and VOTL, respectively). Chemical structure elucidation of HTL, MoO2TL, and VOTL was formulated through the analyses of different spectroscopic tools, along with the thermogravimetric and micro-elemental analyses, the conductance and magnetic measurements.The inhibition strength of the current compounds against the growth of various entitled microorganisms and tumor cell lines of humans was evaluated regarding the role action of the high valent metal ions (MoO22+ and VO2+ ions in their metallodrug candidates). Both MoO2TL and VOTL displayed a significant inhibition action more than that of HTL based on the inhibition zone areas in mm for the microbial series and the half inhibitory concentration in µM (IC50) for the tumor cell lines of their cells’ growth.Also, the interactive and binding nature of HTL, MoO2TL, and VOTL with calf thymus DNA (ctDNA) was evaluated viscometric and spectrophotometric titrations. The interactive modes of HTL, MoO2TL, and VOTL was estimated within the chromism type, the Gibb’s free energy, and binding constant values (ΔGb≠ and Kb, respectively), with reported magnitudes ΔGb≠ (Gibb’s free energy) = -42.06, −48.11 and −47.67 kJ mol−1, and Kb (binding constant) = 14.09, 17.11 and 16.89 × 107 mol−1 dm3, respectively. The bio-reactivity of both MoO2TL and VOTL complexes was modified compared to that of HTL towards ctDNA with covalent/non-covalent and replacement binding interaction.