Metal complexes of a new asymmetric hydrazonic ligand synthesis, characteri-zation and microbicide activities

2,4-dihydroxy-2-hydroxybenzylidene) hydrazono)ethyl)phenyl) ethylidene)hydrazono)ethyl)-2,4-dihydroxyphenyl)ethan-1-one and its Fe(III), Co(II), Ni(II), Cu(II), Zn(II), Ag(I), Cd(II), Hg(II) and ZrO(II) complexes were synthesized and characterized by spectral and analytical techniques. The ligand binds the metal ions as a monobasic or neutral bidentate fashion via the protonated or deprotonated hydroxyl oxygen and azomethine nitrogen atom of salicyl moiety. All metal complexes are non-electrolytic in nature possessing a tetragonal distorted octahedral geometry. ESR spectral data of Cu(II) complexes are typical to d9 configuration with an axial symmetry type of a d(x2-y2) ground state and a significantly covalent environment. The prepared compounds are more active against Fungi than bacteria. the promising active compounds against A. flavus, are (1-6) and (11-14) while complexes (2-6), (8) and (11-13) active against S. cerevisiae.