Mononuclear formamidinate complexes of lithium and sodium

Journal Publication ResearchOnline@JCU
Cole, Marcus L.;Davies, Aaron J.;Jones, Cameron;Junk, Peter C.
Peter Junk
Abstract

Treatment of N,N′-bis(aryl)formamidines (FXylH = N,N′-bis(2,6-dimethylphenyl)formamidine, FEtH = N,N′-bis(2,6-diethylphenyl)formamidine, FisoH = N,N′-bis(2,6-diisopropylphenyl)formamidine) with nBuLi in the presence of tmeda (= N,N,N′,N′-tetramethylethylenediamine) led to deprotonation of the amidine affording [Li(FXyl)(tmeda)] (1), [Li(FEt)(tmeda)] (2) and [Li(Fiso)(tmeda)] (3) respectively. Similar treatment of FXylH and FisoH with [Na{N(SiMe3)2}] in THF and pmdeta (= N,N,N′,N″,N″-pentamethyldiethylenetriamine) yielded [Na(FXyl)(pmdeta)] (4) and [Na(Fiso)(pmdeta)] (5). All complexes were characterised by spectroscopy (NMR and IR) and X-ray crystallography. Due to the bulkiness of the formamidinate ligands and the multidentate nature of the supporting neutral amine ligands (tmeda and pmdeta), all compounds were mononuclear with η2-chelating formamidinate ligands in the solid state.

Journal

Zeitschrift fuer Anorganische und Allgemeine Chemie

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Volume

637

ISBN/ISSN

1521-3749

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Issue

1

Pages Count

6

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Publisher

Wiley-Blackwell

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DOI

10.1002/zaac.201000311