Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases p. 3175 - 3186 (1988)
Update date:2022-07-30
Topics:
Laubry, Philippe
Mousset, Guy
Martinet, Pierre
Tissier, Madeleine
Tissier, Claude
Juillard, Jean
The complexation of Cu2+ by lasalocid and the model compound salicylic acid, AH, has been studied in methanol.The stability constants of species ACu+ and A2Cu were obtained from potentiometric measurements using a pH glass electrode and a copper-selective electrode, and by polarographic determinations.The stability of these copper(II) complexes was shown to be higher than that of the analogous complexes of the other transition-metal cations of the first row and very similar for lasalocid and salicylic acid.The e.s.r. spectra suggest that the structures of the species formed with the two ligands differ; the oxygen of the backbone probably participates in complexation with lasalocid.In addition, other complexes possibly involving the methoxide ion, formed in more basic media, were characterised.
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