Abstract
The polarographic reduction of some arylidene derivatives of benzoic hydrazides is studiedin 35% ethanolic Britton-Robinson buffers at the DME. In acidic media, the reduction occurs along one irreversible four-electron wave which corresponds to the cleavage of the N-N bond and saturation of the C-N centre. In alkaline media the reduction takes place through one two-electron wave corresponding to the saturation of the C=N only. The NO 2 group present in some derivatives is involved in the electrode reaction and reduced to the hydroxylamine stage. The electrode reaction, nature of the waves and substituent effects on the reduction process are discussed.
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