Synthesis of the title compounds from several aryl aldehydes and 2- nitrocyclohexylhydroxylamine has been described and the action of base on these compounds has been investigated. They have all been tested for their antimicrobial activity against the microorganisms such as Staphylococcus aureus, Escherichia coli, Klebsiella aerogenes, Proteus mirabilis, Salmonella paratyphi, Salmonella typhi and Pseudomonas ...