Chemistry of stannylene-based Lewis pairs: dynamic tin coordination switching between donor and acceptor character

Kilian M Krebs; Sarah Freitag; Hartmut Schubert; Birgit Gerke; Rainer Pöttgen; Lars Wesemann

doi:10.1002/chem.201406486

Chemistry of stannylene-based Lewis pairs: dynamic tin coordination switching between donor and acceptor character

Chemistry. 2015 Mar 16;21(12):4628-38. doi: 10.1002/chem.201406486. Epub 2015 Feb 11.

Authors

Kilian M Krebs¹, Sarah Freitag, Hartmut Schubert, Birgit Gerke, Rainer Pöttgen, Lars Wesemann

Affiliation

¹ Institut für Anorganische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen (Germany).

PMID: 25677701
DOI: 10.1002/chem.201406486

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.

Keywords: Lewis pairs; coordination compounds; fluxionality; nickel; palladium.