title: {Sn9[Si(SiMe3)3]3}− and {Sn8Si[Si(SiMe3)3]3}−: variations of the E9 cage of metalloid group 14 clusters.
abstract: The disproportionation reaction of the subvalent metastable halide SnBr proved to be a powerful synthetic method for the synthesis of metalloid cluster compounds of tin. Hence, the neutral metalloid cluster compound Sn(10)[Si(SiMe(3))(3)](6) (3) was synthesized from the reaction of SnBr with LiSi(SiMe(3))(3). In the course of the reaction  anionic clusters might also be present, and we now present the first anionic cluster compound {Sn(8)E[Si(SiMe(3))(3)](3)}(-) (E = Si, Sn), where one position in the cluster core is occupied by a silicon or a tin atom, giving further insight into structural variations of E(9) cages in metalloid group 14 cluster compounds.
authors.affiliation: Institute of Inorganic Chemistry, University of Duisburg-Essen, Universitätsstrasse 5-7, D-45117 Essen, Germany.
authors.forename: Claudio
authors.initials: C
authors.lastname: Schrenk
authors.forename: Marco
authors.initials: M
authors.lastname: Neumaier
authors.forename: Andreas
authors.initials: A
authors.lastname: Schnepf