Synthesis and structures of monomeric magnesium, calcium, strontium, and barium amides involving the N,N-(2,4,6-trimethylphenyl)(trimethylsilyl)amido ligand

Miriam Gillett-Kunnath, Weijie Teng, Wilda Vargas, Karin Ruhlandt

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

An extended family of aryl-substituted alkaline earth metal silylamides M{N(2,4,6-Me3C6H2)(SiMe3)}donor n was prepared using alkane elimination (Mg), salt elimination (Ca, Sr, Ba), and direct metalation (Sr, Ba). Three different donors, THF, TMEDA (TMEDA = N,N,N′,N′-tetramethylethylenediamine), and PMDTA (PMDTA = N,N,N′,N″,N″-pentamethyldiethylenetriamine) were employed to study their influence on the coordination chemistry of the target compounds, producing monomeric species with the composition M{N(2,4,6-Me3C 6H2)(SiMe3)}2(THF)2 (M = Mg, Ca, Sr, Ba), M{N(2,4,6-Me3C6H2)(SiMe 3)}2TMEDA (M = Ca, Ba), and M{N(2,4,6-Me3C 6H2)(SiMe3)}2PMDTA (M = Sr, Ba). For the heavier metal analogues, varying degrees of agostic interactions are completing the coordination sphere of the metals. Compounds were characterized using IR and NMR spectroscopy in addition to X-ray crystallography.

Original languageEnglish (US)
Pages (from-to)4862-4870
Number of pages9
JournalInorganic Chemistry
Volume44
Issue number13
DOIs
StatePublished - Jun 27 2005

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Strontium
Barium
Amides
strontium
Magnesium
amides
barium
magnesium
calcium
elimination
Alkaline Earth Metals
Ligands
Calcium
ligands
Alkanes
alkaline earth metals
X ray crystallography
synthesis
heavy metals
Heavy Metals

ASJC Scopus subject areas

  • Inorganic Chemistry

Cite this

Synthesis and structures of monomeric magnesium, calcium, strontium, and barium amides involving the N,N-(2,4,6-trimethylphenyl)(trimethylsilyl)amido ligand. / Gillett-Kunnath, Miriam; Teng, Weijie; Vargas, Wilda; Ruhlandt, Karin.

In: Inorganic Chemistry, Vol. 44, No. 13, 27.06.2005, p. 4862-4870.

Research output: Contribution to journalArticle

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abstract = "An extended family of aryl-substituted alkaline earth metal silylamides M{N(2,4,6-Me3C6H2)(SiMe3)}donor n was prepared using alkane elimination (Mg), salt elimination (Ca, Sr, Ba), and direct metalation (Sr, Ba). Three different donors, THF, TMEDA (TMEDA = N,N,N′,N′-tetramethylethylenediamine), and PMDTA (PMDTA = N,N,N′,N″,N″-pentamethyldiethylenetriamine) were employed to study their influence on the coordination chemistry of the target compounds, producing monomeric species with the composition M{N(2,4,6-Me3C 6H2)(SiMe3)}2(THF)2 (M = Mg, Ca, Sr, Ba), M{N(2,4,6-Me3C6H2)(SiMe 3)}2TMEDA (M = Ca, Ba), and M{N(2,4,6-Me3C 6H2)(SiMe3)}2PMDTA (M = Sr, Ba). For the heavier metal analogues, varying degrees of agostic interactions are completing the coordination sphere of the metals. Compounds were characterized using IR and NMR spectroscopy in addition to X-ray crystallography.",
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AB - An extended family of aryl-substituted alkaline earth metal silylamides M{N(2,4,6-Me3C6H2)(SiMe3)}donor n was prepared using alkane elimination (Mg), salt elimination (Ca, Sr, Ba), and direct metalation (Sr, Ba). Three different donors, THF, TMEDA (TMEDA = N,N,N′,N′-tetramethylethylenediamine), and PMDTA (PMDTA = N,N,N′,N″,N″-pentamethyldiethylenetriamine) were employed to study their influence on the coordination chemistry of the target compounds, producing monomeric species with the composition M{N(2,4,6-Me3C 6H2)(SiMe3)}2(THF)2 (M = Mg, Ca, Sr, Ba), M{N(2,4,6-Me3C6H2)(SiMe 3)}2TMEDA (M = Ca, Ba), and M{N(2,4,6-Me3C 6H2)(SiMe3)}2PMDTA (M = Sr, Ba). For the heavier metal analogues, varying degrees of agostic interactions are completing the coordination sphere of the metals. Compounds were characterized using IR and NMR spectroscopy in addition to X-ray crystallography.

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