SYNTHESIS, CHARACTERIZATION, BIOCIDAL ACTIVITY AND PHYTOTOTOXIC EFFECT OF Mn(II), Fe(II), Co(II), Cu(II), Zn(II) COMPLEXES OF 3,5-DINITRO BENZOIC ACID.

Five compounds of 3,5-dinitro benzoic acid with Mn(II), Fe(II), Co(II), Cu(II), Zn(II) were synthesized. These complexes were characterized by UV-Vis, IR and elemental analysis. Magnetic moments studies and differential scanning calorimetric were carried out for these complexes. The biological activity of some of the compounds against two fungal pathogens, namely, Lasiodiplodia theobromae and Cruvularia eragrostidis which were isolated from two different crops [a pathogen of mango (Magnifera indica) and a pathogen of tea (Camellia sinensis)] respectively were undertaken to examine their fungicidal activity. The phytotoxic effects of these compounds were also investigated against rice (Oryzae sativa) cultivar Khitish. The structure of Co(II) complex were analyzed by using X-ray diffraction method which was mononuclear, an octahedral O6 donor set defined by two O-monodentate 3,5-dinitrobenzoate anions and four methanol O atoms in our earlier communication.