title: Chemistry of stannylene-based Lewis pairs: dynamic tin coordination switching between donor and acceptor character.
abstract: The coordination chemistry of cyclic stannylene-based intramolecular Lewis pairs is presented. The P→Sn adducts were treated with [Ni(COD)2] and [Pd(PCy3)2] (COD = 1,5-cyclooctadiene, PCy3 = tricyclohexylphosphine). In the isolated coordination compounds the stannylene moiety acts either as an acceptor or a donor ligand. Examples of a dynamic switch between these two coordination modes of the P-Sn ligand are illustrated and the structures in the solid state together with heteronuclear NMR spectroscopic findings are discussed. In the case of a Ni(0) complex, (119)Sn Mössbauer spectroscopy of the uncoordinated and coordinated phosphastannirane ligand is presented.
authors: Institut für Anorganische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen (Germany).
authors: Kilian M
authors: KM
authors: Krebs
authors: Sarah
authors: S
authors: Freitag
authors: Hartmut
authors: H
authors: Schubert
authors: Birgit
authors: B
authors: Gerke
authors: Rainer
authors: R
authors: Pöttgen
authors: Lars
authors: L
authors: Wesemann
keywords: Lewis pairs; coordination compounds; fluxionality; nickel; palladium