title: A family of Au-Tl loosely bound butterfly clusters.
abstract: By treatment of the polymeric species [AuTl(C6Cl5)2]n with ketones or with acetylacetone and 4,4'-bipyridine, the new tetranuclear complexes [Au2Tl2(C6Cl5)4] x L (L = PhMeC=O, acacH) or [Au2Tl2(C6Cl5)4(bipy)] x (acacH) have been prepared. Their crystal structures have been determined by X-ray diffraction methods and they all present a central Au2Tl2 core formed via one Tl...Tl and four Au...Tl unsupported interactions resulting in a loosely bound butterfly cluster. These complexes are strongly luminescent in both the solid state and solution showing an optical behavior in agreement with the maintenance of the Tl...Tl contact even in solution.
authors.affiliation: Departamento de Química, Universidad de La Rioja, Grupo de Síntesis Química de La Rioja, UA-CSIC, Madre de Dios 51, E-26004 Logroño, Spain.
authors.forename: Eduardo J
authors.initials: EJ
authors.lastname: Fernández
authors.forename: José M
authors.initials: JM
authors.lastname: López-de-Luzuriaga
authors.forename: M Elena
authors.initials: ME
authors.lastname: Olmos
authors.forename: Javier
authors.initials: J
authors.lastname: Pérez
authors.forename: Antonio
authors.initials: A
authors.lastname: Laguna
authors.forename: M Cristina
authors.initials: MC
authors.lastname: Lagunas