X-Ray and potentiometric studies on a pentanuclear copper(II) complex with β-alaninehydroxamic acid
- 1 January 1991
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 2,p. 163-167
- https://doi.org/10.1039/dt9910000163
Abstract
Potentiometric and X-ray studies on the system copper(II)–L-β-alaninehydroxamic acid have shown the formation of a very stable pentanuclear complex [Cu5A4H–4]2+ at pH around 4. In this species all donor atoms of the aminohydroxamic acid are involved in the metal ion co-ordination. Four peripheral metal ions form an almost planar structure and the central metal ion is 0.4 Å above this plane. There are twelve five- and six-membered chelate rings with different conformations. The X-ray structure results support earlier suggestions based on potentiometric and spectroscopic data for the formation of oligomeric structures at relatively low pH.Keywords
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