title: Benzannulated N-heterocyclic germylenes and stannylenes with sterically demanding N,N'-substituents.
abstract: Four N,N'-disubstituted 1,2-diaminobenzes (1a: R = t-Bu, 1b: R = adamantyl, 1c: R = Ph, 1d: R = Dipp) have been prepared and reacted with E[N(SiMe3)2]2 (E = Ge, Sn) to give the benzannulated N-heterocyclic germylenes 2a-d and stannylenes 3a-d. Germylene 2d and stannylenes 3a, 3c and 3d have been characterized by X-ray diffraction showing different types of intermolecular interactions in the solid state. Deprotonation of 1b with n-BuLi yields the lithium stannyl anion Li[4] with an n-Bu group bound to the tin(II) center.
authors.affiliation: Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 30, D-48149 Münster, Germany. fehahn@uni-muenster.de.
authors.forename: Sergei
authors.initials: S
authors.lastname: Krupski
authors.forename: Rainer
authors.initials: R
authors.lastname: Pöttgen
authors.forename: Inga
authors.initials: I
authors.lastname: Schellenberg
authors.forename: F Ekkehardt
authors.initials: FE
authors.lastname: Hahn