Journal of the Chemical Society. Perkin Transactions 2 (2001) p. 217 - 220 (1996)
Update date:2022-08-16
Topics:
Pletcher, Derek
Slevin, Louise
The presence in the medium of free MgII leads to a complete change in the voltammetry for the reduction of 2-acetylnaphthalene in DMF-Bu4NBF4 saturated with carbon dioxide. The mechanism for these changes has been investigated and it is confirmed that the Mg II interacts with the radical anions formed in the initial electron transfer reaction. The relevance of these conclusions to electrocarboxylations carried out in undivided cells with a sacrificial Mg anode is discussed. It is concluded that all the MgII formed at the anode is complexed strongly by the final carboxylated products from the cathode reaction and therefore the cathode reaction occurs in an environment where no free MgII ions are available. On the other hand, the complexation of the carboxylated products stabilises them to unwanted further reactions, thereby improving the selectivity of the electrosynthesis.
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