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Polarographic and electrochemical studies of some aromatic nitro compounds: Part VII. Polarographic, voltammetric, and controlled potential electrolytic reduction of meta‐ and para‐nitrobenzaldehyde
Author(s) -
Fijalek Zbigniew,
Pugia Michael,
Zuman Petr
Publication year - 1993
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140050111
Subject(s) - polarography , chemistry , nitro , electrochemistry , inorganic chemistry , supporting electrolyte , protonation , electrolyte , organic chemistry , electrode , ion , alkyl
In acidic media, at pH < 7, the nitro groups in both meta‐ and para‐nitrobenzaldehyde are reduced in a four‐electron process and form corresponding formylhydroxylamines. These species are reduced in protonated forms to corresponding formylanilines, which are further reduced in two‐electron steps to alcohols. At pH > 7, the formylhydroxylamine condenses rapidly to form a nitrone, which is further reduced to two two‐electron steps, for the derivative of meta‐nitrobenzaldehyde overlap. The addition of ortho‐ to para‐nitrobenzaldehyde results in cross‐condensation.