Issue 9, 2004
From the journal:

Dalton Transactions

Unexpected formation of a copper(ii) 12-metallacrown-4 with (S)-glutamic-γ-hydroxamic acid: a thermodynamic and spectroscopic study in aqueous solution

Matteo Tegoni,a   Francesco Dallavalle,*a   Barbara Belosib  and  Maurizio Remellib  

* Corresponding authors

a Dipartimento di Chimica Generale ed Inorganica, Chimica Analitica, Chimica Fisica, Università di Parma, Parco Area delle Scienze, 17A, 43100 Parma, Italy
E-mail: dallav@unipr.it
Fax: +39 0521 905557

b Dipartimento di Chimica, Università di Ferrara, Via L. Borsari, 46, 44100 Ferrara, Italy

Abstract

The equilibria of copper(II) with (S)-glutamic-γ-hydroxamic acid (H2L) were investigated in aqueous solution by different techniques: glass electrode potentiometry; calorimetry; VIS and CD spectrophotometry; and ES-MS. An unexpected pentacopper(II) 12-metallacrown-4 [Cu5L4H−4]2− was detected, analogous to those well known formed by α- and β-aminohydroxamic acids, but of lower stability. Another five species were found: [CuLH]+; [CuL2H2]; [Cu2L2]; [CuL2H]−; and [CuL2]2−. Their structures are proposed based on both spectroscopic and calorimetric data.

Graphical abstract: Unexpected formation of a copper(ii) 12-metallacrown-4 with (S)-glutamic-γ-hydroxamic acid: a thermodynamic and spectroscopic study in aqueous solution

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Article information

DOI
https://doi.org/10.1039/B316607D
Article type
Paper
Submitted
19 Dec 2003
Accepted
04 Mar 2004
First published
24 Mar 2004

Dalton Trans., 2004, 1329-1333

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Unexpected formation of a copper(II) 12-metallacrown-4 with (S)-glutamic-γ-hydroxamic acid: a thermodynamic and spectroscopic study in aqueous solution

M. Tegoni, F. Dallavalle, B. Belosi and M. Remelli, Dalton Trans., 2004, 1329 DOI: 10.1039/B316607D

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