Structural diversity of copper complexes with angular and linear dipyridyl ligands |
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| Institution: | 1. Departamento de Química Inorgánica de la Universidad Autónoma de Madrid, 28049 Madrid, Spain;2. Servicio Interdepartamental de Investigación, Laboratory of Single Crystal X-ray Diffraction, Universidad Autónoma de Madrid, Spain;3. Departamento de Química Inorgánica, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria, 28040 Madrid, Spain |
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| Abstract: | The versatile coordination properties of the 2,2′ and 4,4′-long conjugated bidentate ligands 2,5-bis(2-pyridylethynyl)thiophene (L1), 2,2′-dipyridyldisulfide (L2) and 4,4′-dipyridyldisulfide (L3) with copper acetate has been investigated. Reactions with 2,5-bis(2-pyridylethynyl)thiophene (L1) and 4,4′-dipyridyldisulfide (L3) leads to two types of complexes. So, when methanol solutions of Cu(OAc)2 · H2O were allowed to diffuse into a solution of L1 or L3 (ratio 1:1), green crystals of the molecular 1:2 adduct Cu2(μ-OAc)4(L1)2 (1) and the infinite coordination polymer Cu2(μ-OAc)4(L3)]n (2) were obtained. The reaction with L2, under reflux in MeOH, affords the copper(I) cluster Cu6(SC5H4N)6 (3) and the dimer Cu(μ-S)(L2)]2 (4). Compound 3 was already known by reaction of the copper(I) salt Cu(NCMe)4]PF6 with SC5H4NH in acetone. The structures were determined by X-ray crystallography and their magnetic properties examined. |
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