Syntheses and structures of the first heavy alkaline earth metal bis(tris(trimethylsilyl))silanides

Weijie Teng, Karin Ruhlandt

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The first heavy alkaline earth metal bis(tris(trimethylsilyl))silanides were obtained in high yield and purity by a straightforward metathesis reaction involving the treatment of potassium tris(trimethylsilyl)silanide, K(THF) nSi(SiMe 3) 3, with calcium, strontium, and barium iodides. The addition of specific donors provided either contact or separated species in the solid state, whereas in aromatic solvents the compounds dissociate into separated ions, as shown by 29Si NMR spectroscopic studies. We here report on the syntheses and characterization of compounds displaying M-Si bonds in the solid state with the general formula of M(THF) n(Si(SiMe 3) 3) 2 (M = Ca, n = 3, 1; Sr, n = 3, 2; and Ba, n = 4, 3) and Sr(TMEDA)(THF)(Si(SiMe 3)) 3) 2, 4 (TMEDA = N,N,N′,N′- tetramethylethylenediamine). Compound 5, [Ba(HMPA) 6][(Si(SiMe 3) 3)2], displays separated ions, while 6, [Ba(18-crown-6)(Si(SiMe 3) 3) 2][Ba(HMPA) 6][(Si(SiMe 3) 3) 2], is a rare example containing both contact and separated ions in the asymmetric unit. All compounds were characterized using X-ray crystallography, 1H, 13C, and 29Si NMR, and IR spectroscopy.

Original languageEnglish (US)
Pages (from-to)2694-2700
Number of pages7
JournalOrganometallics
Volume23
Issue number11
DOIs
StatePublished - May 24 2004

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Alkaline Earth Metals
alkaline earth metals
heavy metals
Hempa
Heavy metals
Ions
synthesis
solid state
nuclear magnetic resonance
Strontium
ions
metathesis
X ray crystallography
Iodides
Barium
strontium
iodides
Nuclear magnetic resonance spectroscopy
crystallography
barium

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Organic Chemistry

Cite this

Syntheses and structures of the first heavy alkaline earth metal bis(tris(trimethylsilyl))silanides. / Teng, Weijie; Ruhlandt, Karin.

In: Organometallics, Vol. 23, No. 11, 24.05.2004, p. 2694-2700.

Research output: Contribution to journalArticle

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