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Synthesis and structures of [(trimethylsilyl)methyl]sodium and -potassium with bi- and tridentate n-donor ligands

Clegg, William and Conway, Benjamin Grant and Kennedy, Alan R. and Klett, Jan and Mulvey, Robert E. and Russo, Luca (2011) Synthesis and structures of [(trimethylsilyl)methyl]sodium and -potassium with bi- and tridentate n-donor ligands. European Journal of Inorganic Chemistry, 2011 (5). pp. 721-726. ISSN 1434-1948

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Abstract

[(Trimethylsilyl) methyl] sodium [NaCH2SiMe3] (1) was prepared by a metathesis reaction of [(trimethylsilyl) methyl] lithium [LiCH2SiMe3] with sodium tert-butoxide in n-hexane. Polydentate donors such as N,N,N',N'-tetramethylethylenediamine (TMEDA) and N,N,N', N '', N ''-pentamethyldiethylenetriamine (PMDETA) form n-hexane-soluble complexes of 1 and the potassium congener [KCH2SiMe3] (2). The crystal structures of the polymers [(TMEDA) NaCH2SiMe3] (1a) and [(PMDETA) KCH2SiMe3] (2a) were determined as infinite helical chains exhibiting 3(1) or 3(2) screw-axis symmetry. Compound 2b was obtained as the donor-deficient heterocubane pseudotetramer [(TMEDA)(3)(KCH2SiMe3)(4)], with intermolecular interactions of the TMEDA-uncoordinated potassium atom with a peripheral methyl group of a neighbouring tetramer to form infinite chains. The relatively easy accessibility and stability should make these (trimethylsilyl) methyl compounds of sodium and potassium valuable starting points for further exploration of the chemistry of these common-utility heavier alkali metals.

Item type:Article
ID code:33730
Keywords:aggregation, carbanions, sodium, potassium, n-donor ligands, ray crystal-structures, alkali-metal alkyls, organometallic compounds, thermal-decomposition, mediated zincation, aryl derivatives, strong bases, complexes, calcium, benzyl, Physical and theoretical chemistry, Bioengineering, Inorganic Chemistry
Subjects:Science > Chemistry > Physical and theoretical chemistry
Technology > Engineering (General). Civil engineering (General) > Bioengineering
Department:Faculty of Science > Pure and Applied Chemistry
Depositing user: Pure Administrator
Date deposited:18 Oct 2011 11:05
Last modified:17 May 2019 02:21
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URI:https://strathprints.strath.ac.uk/id/eprint/33730
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