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The numerous studies of 3 d–4 f metallamacrocyclic complexes in the last few decades arise from their potentially interesting catalytic (Griffiths & Kostakis, 2018 ), luminescence (Jankolovits et al., 2011 Li et al., 2017 ) and magnetic properties (Dhers et al., 2016 Zangana et al., 2014 ).

High-quality X-ray data obtained for 1– 3 have allowed a re-evaluation of the X-ray data solution proposed earlier for the EuCu 5 complex and suggest that the formula is actually ♳.5H 2O. The lattice parameters of complexes 1– 3 are similar to those previously reported for an Eu III–Cu II 15-metallacrown-5 complex with glycinehydroxamate of proposed composition ♳.5H 2O. The electroneutrality of complexes 1– 3 is achieved by a bidentate carbonate anion coordinated to the Ln III ion and a monodentate nitrate anion coordinated apically to one of the copper(II) ions of the metallamacrocycle. 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,

Instal the new for windows Google Drive 77.0.3