title: Mononuclear and polynuclear complexes ligated by an iminodiacetic acid derivative: synthesis, structure, solution studies and magnetic properties.
abstract: Two novel families of coordination polymers, [Ln(bzlida)(Hbzlida)]·H2O (Ln = La, Nd) and [Ln2(bzlida)3]·3H2O (Ln = Nd, Sm, Eu, Gd) were prepared by hydrothermal reaction of Ln2O3 with benzyliminodiacetic acid (H2bzlida). The conditions of synthesis, in particular the pH value, were selected on the basis of previous speciation studies reported in this work. The first type of complex consists of 1D chains built by a fully deprotonated ligand bridging two lanthanide ions and protonated Hbzlida(-) ligands connecting three cations. The second type is formed by [Ln2(bzlida)3] bimetallic units in which the ligand has a tridentate NOO coordination mode. This is expanded to a 2D network through carboxylate linkers. Under similar synthetic conditions but including copper acetate in the reaction mixture, a new compound was also obtained and characterized: [Cu(bzlida)2{Er(AcO)(H2O)5}2][Cu(bzlida)2]·6H2O (AcO = acetate). This salt is made up of the [Cu(bzlida)2{Er(AcO)(H2O)5}2](2+) heterotrimetallic complex cation containing an acetato bridge, and the [Cu(bzlida)2](2-) anion. The same reaction produces the monomeric [Cu(Hbzlida)2]·4H2O whose structure was also elucidated. Magnetic properties of the Gd(iii) derivative were studied and analyzed experimentally and theoretically. The results are compared and discussed with respect to those reported in the literature and a magnetostructural correlation is suggested.
authors.affiliation: Cátedra de Química Inorgánica, Departamento Estrella Campos, Facultad de Química, Universidad de la República, Avda. General Flores 2124, Montevideo, Uruguay. ckremer@fq.edu.uy.
authors.forename: Roberto
authors.initials: R
authors.lastname: Puentes
authors.affiliation: Cátedra de Química Inorgánica, Departamento Estrella Campos, Facultad de Química, Universidad de la República, Avda. General Flores 2124, Montevideo, Uruguay. ckremer@fq.edu.uy.
authors.forename: Julia
authors.initials: J
authors.lastname: Torres
authors.affiliation: Cátedra de Química Inorgánica, Departamento Estrella Campos, Facultad de Química, Universidad de la República, Avda. General Flores 2124, Montevideo, Uruguay. ckremer@fq.edu.uy.
authors.forename: Carlos
authors.initials: C
authors.lastname: Kremer
authors.affiliation: Instituto de Ciencia Molecular, Universidad de Valencia, C/Catedrático José Beltrán, 2, E-46980 Paterna, Valencia, Spain and Fundació General de la Universitat de València (FGUV), Spain.
authors.forename: Joan
authors.initials: J
authors.lastname: Cano
authors.affiliation: Instituto de Ciencia Molecular, Universidad de Valencia, C/Catedrático José Beltrán, 2, E-46980 Paterna, Valencia, Spain.
authors.forename: Francesc
authors.initials: F
authors.lastname: Lloret
authors.affiliation: Dipartimento di Chimica, Università di Parma, Viale delle Scienze 17A, 43124 Parma, Italy.
authors.forename: Davide
authors.initials: D
authors.lastname: Capucci
authors.affiliation: Dipartimento di Chimica, Università di Parma, Viale delle Scienze 17A, 43124 Parma, Italy.
authors.forename: Alessia
authors.initials: A
authors.lastname: Bacchi