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Structural trends in a series of isostructural lanthanide–copper metallacrown sulfates (Ln^III^= Pr, Nd, Sm, Eu, Gd, Dy and Ho): hexaaquapentakis[μ~3~-glycinehydroxamato(2−)]sulfatopentacopper(II)lanthanide(III) heptaaquapentakis[μ~3~-glycinehydroxamato(2−)]sulfatopentacopper(II)lanthanide(III) sulfate hexahydrate by Anna V. Pavlishchuk; Sergey V. Kolotilov; Igor O. Fritsky; Matthias Zeller; Anthony W. Addison; Allen D. Hunter is a Chemistry article available to read on EtoBox.

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The seven isostructural complexes, [Cu(5)Ln(C(2)H(4)N(2)O(2))(5)(SO(4))(H(2)O)(6.5)](2)(SO(4))·6H(2)O, where Ln(III) = Pr, Nd, Sm, Eu, Gd, Dy and Ho, are representatives of the 15-metallacrown-5 family. Each dianion of glycinehydroxamic acid (GlyHA) links two Cu(II) cations forming a cyclic [CuGlyHA](5) frame. The Ln(III) cations are located at the centre of the [CuGlyHA](5) rings and are bound by the five hydroxamate O atoms in the equatorial plane. Five water molecules are coordinated to Cu(II) cations, and one further water molecule, located close to an inversion centre between two adjacent [Cu(5)Ln(GlyHA)(5)](2+) cations, is disordered around this inversion centre and coordinated to a Cu(II) cation of either the first or second metallacrown ether. Another water molecule and one of the two crystallographically independent sulfate anions are coordinated, the latter in a bidentate fashion, to the Ln(III) cation in the axial positions. The second sulfate anion is not coordinated to the cation, but is located in an interstitial position on a crystallographic inversion centre, thus leading to disorder of the O atoms around the centre of inversion. The Ln-O bond distances follow the t

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Author

Anna V. Pavlishchuk; Sergey V. Kolotilov; Igor O. Fritsky; Matthias Zeller; Anthony W. Addison; Allen D. Hunter

Publisher

International Union of Crystallography; Blackwell Publishing Inc.; International Union of Crystallography (IUCr); Wiley (ISSN 0108-2701)

Published

2011

Language

EN

Field

Chemistry (Physical Sciences)