Novel bis ligand namely 2,2'-(4,4'-(3,3'-dimethylbiphenyl-4,4'-diyl)bis(diazene-2,1-diyl) bis (4,1phenylene)) bis(azanediyl) bis (oxomethylene) dibenzoic acid (H2L) has been prepared and characterized. The Coordination polymers based on this bis ligand with transition metal ions viz,Cu+2,Ni+2,Mn+2,Zn+2,Co+2 were prepared and studied for their metal:ligand (M/L), stoichiometry, magnetic moment, spectral features, number-average molecular weight(Mn ) and by thermogravimetry. The microbicidal activity of all the samples had also been monitored against plant pathogens.