The layered structure of [Na(NH3)4][Indenide] containing a square-planar Na(NH3)4(+) cation

Reent Michel; Tobias Nack; Roman Neufeld; Johannes M Dieterich; Ricardo A Mata; Dietmar Stalke

doi:10.1002/anie.201207082

The layered structure of [Na(NH3)4][Indenide] containing a square-planar Na(NH3)4(+) cation

Angew Chem Int Ed Engl. 2013 Jan 7;52(2):734-8. doi: 10.1002/anie.201207082. Epub 2012 Nov 21.

Authors

Reent Michel¹, Tobias Nack, Roman Neufeld, Johannes M Dieterich, Ricardo A Mata, Dietmar Stalke

Affiliation

¹ Institut für Anorganische Chemie der Universität Göttingen, Germany.

PMID: 23169687
DOI: 10.1002/anie.201207082

Abstract

It's hip to be a square! The ammines [Li(NH(3))(4)][Ind] and [Na(NH(3))(4)][Ind] both contain a cation coordinated by four ammonia molecules. Whereas the first shows the anticipated tetrahedral coordination, in the second the metal coordination is unexpectedly square-planar. The solvent-separated ion pair forms a rippled layer structure of alternating planar Na(NH(3))(4)(+) cations and indenyl carbanions that is attributed to NH(3) ⋅⋅⋅π hydrogen bonds.