The Ln III ions are coordinated to the metallamacrocycle through five O-donor hydroxamates. Complexes 1– 3 contain five copper(II) ions and five bridging GlyHA 2− anions, forming a 5 metallamacrocyclic core. xH 2O (GlyHA 2− is glycinehydroxamate, N-hydroxyglycinamidate or aminoacetohydroxamate, C 2H 4N 2O 2 2−), with lanthanide(III) ( Ln III) = gadolinium (Gd, 1, x = 3.5), dysprosium (Dy, 2, x = 3.28) and holmium (Ho, 3, x = 3.445), within a 15-metallacrown-5 class were obtained on reaction of lanthanide(III) nitrate, copper(II) acetate and sodium glycinehydroxamate.
Three new isotypic heteropolynuclear complexes, namely pentaaquacarbonatopentakis(glycinehydroxamato)nitratopentacopper(II)lanthanide(III) x-hydrate,
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