title: Reactions with a Metalloid Tin Cluster {Sn10[Si(SiMe3)3]4}(2-): Ligand Elimination versus Coordination Chemistry.
abstract: Chemistry that uses metalloid tin clusters as a starting material is of fundamental interest towards understanding the reactivity of such compounds. Since we identified {Sn10[Si(SiMe3)3]4}(2-) 7 as an ideal candidate for such reactions, we present a further step in the understanding of metalloid tin cluster chemistry. In contrast to germanium chemistry, ligand elimination seems to be a major reaction channel, which leads to the more open metalloid cluster {Sn10[Si(SiMe3)3]3}(-) 9, in which the Sn core is only shielded by three Si(SiMe3)3 ligands. Compound 9 is obtained through different routes and is crystallised together with two different countercations. Besides the structural characterisation of this novel metalloid tin cluster, the electronic structure is analysed by (119)Sn Mössbauer spectroscopy. Additionally, possible reaction pathways are discussed. The presented first step into the chemistry of metalloid tin clusters thus indicates that, with respect to metalloid germanium clusters, more reaction channels are accessible, thereby leading to a more complex reaction system.
authors.affiliation: Faculty of Science, Institute of Inorganic Chemistry, University Tübingen, Auf der Morgenstelle 18, 72076 Tübingen (Germany), Fax: (+49) 7071-29-2436.
authors.forename: Claudio
authors.initials: C
authors.lastname: Schrenk
authors.affiliation: Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstrasse 30, 48149 Münster (Germany).
authors.forename: Birgit
authors.initials: B
authors.lastname: Gerke
authors.affiliation: Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstrasse 30, 48149 Münster (Germany).
authors.forename: Rainer
authors.initials: R
authors.lastname: Pöttgen
authors.affiliation: Department of Chemistry, Nanoscience Center, University of Jyväskylä, Survontie 9C, 40014 Jyväskylä (Finland).
authors.forename: Andre
authors.initials: A
authors.lastname: Clayborne
authors.affiliation: Faculty of Science, Institute of Inorganic Chemistry, University Tübingen, Auf der Morgenstelle 18, 72076 Tübingen (Germany), Fax: (+49) 7071-29-2436. andreas.schnepf@uni-tuebingen.de.
authors.forename: Andreas
authors.initials: A
authors.lastname: Schnepf
keywords: cluster compounds; ligand elimination; metalloid clusters; quantum chemistry; tin