Stereochemical, thermal and biochemical aspects of dioxomolybdenum(VI) andmanganese(II) complexes

Stereochemical, thermal and biochemical studies of molybdenum(VI) and manga nese(II) complexes prepared by the reactions of dioxobis (2,4-pentanedionat o) molybdenum(VI) and hydrated manganese dichloride with 2-hydroxy-N-phenyl benzamide, 1-[2-hydroxy-phenyl)-1-N-phenylamino]hydrazine carboxamide and 1 -[2-hydroxyphenyl)-1-N-phenylamino]hydrazine carbo-thioamide in different s toichiometries have been reported. An attempt has been made to establish th e structures of the resulting complexes on the basis of elemental analysis, molecular weight determinations magnetic measurements, IR,H-1 and C-13 NMR , UV and ESR spectral studies. The results of thermogravimetric and differe ntial thermal analysis of the complexes suggest first order reaction. The X -ray powder diffraction pattern of representative compounds confirm the ort horhombic crystal system. The antimicrobial screening data of in vitro stud ies indicate that the metal chelates are more potent than the parent ligand s. The in vivo studies of the representative ligands and their correspondin g metal derivatives indicate them to be effective in controlling the leaf s pot disease of brinjal plant caused by A. alternata. The antifertility scre ening data indicate the anti-androgenic nature of the complexes.