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Crystals 2017, 7(7), 192; doi:10.3390/cryst7070192

Synthesis, Crystal Structure, and Magnetic Properties of Amidate and Carboxylate Dimers of Ruthenium

1
Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria, E-28040 Madrid, Spain
2
Centro de Asistencia a la Investigación Difracción Rayos X, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria, E-28040 Madrid, Spain
*
Authors to whom correspondence should be addressed.
Academic Editor: Shujun Zhang
Received: 15 June 2017 / Revised: 23 June 2017 / Accepted: 25 June 2017 / Published: 27 June 2017
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Abstract

Solvothermal and microwave-assisted methods have been used to prepare several amidate and carboxylate complexes of the type [Ru2X(µ-NHOCC6H3-3,5-(OMe)2)4]n [X = Cl (1), Br (2), I (3)] and [Ru2X(µ-O2CC6H3-3,5-(OMe)2)4]n [X = Cl (4), Br (5), I (6)]. Complexes 46 have also been obtained by conventional synthesis which is ineffective to prepare the amidate compounds. However, single crystals of complexes 15 were obtained using the solvothermal method. The single crystal X-ray structure determination of compounds 15 have been carried out. All complexes display a paddlewheel-type structure with the metal atoms connected by four bridging amidate or carboxylate ligands. Chloride, bromide, or iodide anions connect the dimetallic units, producing one-dimensional zigzag chains. The magnetic properties of all compounds were studied. The magnetic moment at room temperature are in accordance with an electronic configuration with three unpaired electrons σ2π4δ2(π*δ*)3 per dimer unit. The fit of the magnetic data suggests the existence, in these complexes, of a weak antiferromagnetic intermolecular interaction between the diruthenium units mediated by the halide ligand and an appreciable zero-field splitting in the diruthenium moieties. View Full-Text
Keywords: diruthenium; multiple bonds; metal-metal bonds; microwave; solvothermal; amidates; carboxylates; magnetic properties diruthenium; multiple bonds; metal-metal bonds; microwave; solvothermal; amidates; carboxylates; magnetic properties
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MDPI and ACS Style

Delgado-Martínez, P.; Freire, C.; González-Prieto, R.; Jiménez-Aparicio, R.; Priego, J.L.; Torres, M.R. Synthesis, Crystal Structure, and Magnetic Properties of Amidate and Carboxylate Dimers of Ruthenium. Crystals 2017, 7, 192.

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