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A new synthetic route towards heterotrimetallic complexes. Synthesis, crystal structure and magnetic properties of a [CuMnCr] trinuclear complex |
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| Authors: | Diana Visinescu Jean-Pascal Sutter Marius Andruh |
| Affiliation: | a Inorganic Chemistry Laboratory, Faculty of Chemistry, University of Bucharest, Str. Dumbrava Rosie 23, 020464 Bucharest, Romania b Coordination Chemistry Laboratory, Institute of Physical Chemistry “I.G. Murgulescu”, Splaiul Independentei 202, 060021 Bucharest, Romania c Laboratoire de Chimie de Coordination-CNRS, 205 Route de Narbonne, 31077 Toulouse, France d Laboratorio de rayos X y Materiales Moleculares, Departamento de Fisica Fundamental II, Universidad de La Laguna, Tenerife, Spain |
| Abstract: | The heterotrimetallic complex, [{LCuMn(H2O)}{Cr(phen)(C2O4)2}](ClO4) · H2O (1), has been obtained by assembling heterobinuclear cations, [LCuMn]2+, with [Cr(phen)(C2O4)2]− ions (H2L is the compartmental Schiff-base resulting from the stepwise condensation of 2,6-diformyl-p-cresol with ethylenediamine and diethylenetriamine). The copper(II) and manganese(II) ions are hosted into the compartments of the macrocyclic ligand. [Cr(phen)(C2O4)2]− acts as a ligand, being coordinated through one oxalato oxygen atom to the apical position of the square pyramidal copper(II) ion. The cryomagnetic investigation of 1 reveals an antiferromagnetic interaction between CuII and MnII within the compartmental ligand (J = −39 cm−1). The interaction between CuII and CrIII across the oxalato bridge is negligible. The crystal structure of [LCuPb](ClO4)2 · H2O, a useful precursor in obtaining 3d-3d′ complexes, is also reported. |
| Keywords: | Heterotrimetallic complexes Copper complexes Manganese complexes Chromium complexes Lead complexes Magnetic properties |
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