title: Synthesis of a large functional cage compound based on four Ga-Ga single bonds and its application as an oligoacceptor: on the way to bio-organogallium hybrid molecules.
abstract: The digallium compound R(2)Ga-GaR(2) (1; R=CH(SiMe(3))(2)) reacts with citracinic acid by the release of two equivalents of bis(trimethylsilyl)methane and the formation of a unique oligofunctional cage compound (2). Four Ga-Ga bonds in a tetrahedral arrangement are bridged by four spacer ligands that are located on the faces of the tetrahedron and bridge the gallium atoms of three different Ga-Ga bonds. Four pyridinium groups result from the shift of one of the three acidic protons of four citracinic acid molecules to the nitrogen atoms of the aromatic rings. The N-H groups are arranged in pairs and are capable of acting as chelating acceptors for the coordination of THF molecules (2(THF)(2)) or the nitrogen atoms of 1-deazapurine (3(OEt(2))(4)). In particular, the last reaction verifies the potential applicability of this relatively water- and air-resistant acceptor compound for the generation of bioorganometallic hybrid molecules.
authors.affiliation: Institut für Anorganische und Analytische Chemie der Universität Münster, Corrensstrasse 30, 48149 Münster, Germany. uhlw@uni-muenster.de
authors.forename: Werner
authors.initials: W
authors.lastname: Uhl
authors.forename: Matthias
authors.initials: M
authors.lastname: Voss
authors.forename: Jens
authors.initials: J
authors.lastname: Müller
authors.forename: Kristof
authors.initials: K
authors.lastname: Seubert
mesh_terms: D018360:Crystallography, X-Ray; D005708:Gallium / Q000737:chemistry*; D008024:Ligands; D008958:Models, Molecular; D008969:Molecular Sequence Data; D015394:Molecular Structure
chemical_list: D008024:Ligands; D005708:Gallium