Electro-inorganic synthesis: a convergent paired electrochemical synthesis and voltammetric studies of copper(II)-2-aminophenol derivatives
Electrochemical reduction of 2-nitrophenol and 5-methyl-2-nitrophenol has been studied in water/ethanol mixture using cyclic voltammetry and controlled-potential coulometry. Our voltammetric data indicate the formation of 2-aminophenol (HL I ) and 5-methyl-2-aminophenol (HL II ), respectively. Also,...
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Published in | Journal of the Iranian Chemical Society Vol. 9; no. 5; pp. 693 - 704 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Berlin/Heidelberg
Springer-Verlag
01.10.2012
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Subjects | |
Online Access | Get full text |
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Summary: | Electrochemical reduction of 2-nitrophenol and 5-methyl-2-nitrophenol has been studied in water/ethanol mixture using cyclic voltammetry and controlled-potential coulometry. Our voltammetric data indicate the formation of 2-aminophenol (HL
I
) and 5-methyl-2-aminophenol (HL
II
), respectively. Also, the electrochemical synthesis of copper(II) complex of 2-aminophenols has been carried out using copper metal as a sacrificial anode and lead metal as a cathode in water/ethanol (50/50 v/v). The electrochemical synthesis of copper(II)-2-aminophenols consists of a multi-step such as (a) cathodic reduction of 2-nitrophenols to related 2-aminophenols, (b) generation of Cu
2+
from copper anode, (c) complexation of 2-aminophenols with Cu
2+
. In this work, we have proposed a mechanism for the electrode process. Some parameters such as electrode material, current density, electricity passed and temperature, were also systematically studied. The convergent paired electrochemical synthesis of copper(II) complex of 2-aminophenols has been successfully performed in a one-pot process, under constant current condition in an undivided cell, in a good yield and purity. Also, the electrochemical behavior of copper(II)-2-aminophenol complex was studied and the stability constant of copper(I)-2-aminophenol complex was evaluated using cyclic voltammetry. |
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ISSN: | 1735-207X 1735-2428 |
DOI: | 10.1007/s13738-012-0082-7 |