Two series of chalcone based sulfone and bisulfone derivatives were synthesized using chalcone, thiophenol and sodium metal at room temperature, followed by oxidation of chalcone sulfides with m-CPBA at 0° C in a novel method. Both sulfones and bisulfones were evaluated for their antimicrobial activities against Aspergillus niger and Candida albicans (yeast), Bacillus subtilis and Staphylococcus aureus (Gram (+) bacteria) and ...