Kristallstruktur und spektroskopische Untersuchung von Mg(GeMe₃)₂ · 2 DME / Crystal Structure and Spectroscopic Study of Mg(GeMe₃)₂ · 2 DME

Abstract

<jats:p>Mg(GeMe<jats:sub>3</jats:sub>)<jats:sub>2</jats:sub> · 2 DME is synthesized by reaction of Hg(GeMe<jats:sub>3</jats:sub>)<jats:sub>2</jats:sub> with magnesium in 1 ,2 -- dimethoxyethane. The X-ray structure, IR, Raman, <jats:sup>1</jats:sup>H NMR , and <jats:sup>13</jats:sup>C NMR spectra of this first organogermyl magnesium compound are reported.</jats:p>

Syntheses and Structures of the First Heavy Alkaline Earth Metal Germanides M(THF)n(Ge(SiMe3)3)2 (M = Ca, n = 3; M = Sr, n = 3; and M = Ba, n = 4)

“…Synthetic Aspects. The only well-characterized alkaline earth metal germanide, Mg(DME) 2 (GeMe 3 ) 2 , was prepared by reacting Hg(GeMe 3 ) 2 with elemental magnesium . In an attempt to limit use of mercury and its compounds, we synthesized the target compounds by facile, straightforward metathesis chemistry.…”

“…Well-characterized alkaline earth metal derivatives bearing heavy group 14 ligands are mainly limited to magnesium with Mg(donor)(SiMe 3 ) 2 , donor = DME, NMe 2 (CH 2 ) 3 NMe 2 ,6a TMEDA 6b (DME = 1,2-dimethyloxyethane, TMEDA = N , N , N‘ , N‘ -tetramethylethylenediamine), [Mg(TMEDA)Br(SiMe 3 )] 2 , Mg(THF) 2 Br(Si(SiMe 3 ) 3 ), Mg(THF) 2 (Si(SiMe 3 ) 3 ) 2 , and Mg(DME) 2 (GeMe 3 ) 2 . For the heavier metals, examples are limited to silanides and stannides, including the THF adducts M(THF) n (Si(SiMe 3 ) 3 ) 2 (M = Ca, n = 3; M = Sr, n = 3; M = Ba, n = 4), the mixed THF/TMEDA derivative Sr(TMEDA)THF(Si(SiMe 3 ) 3 ) 2 , the separated ion [Ba(HMPA) 6 ][Si(SiMe 3 ) 3 ] 2 , and a species containing both contact and separated ions in the crystal, [Ba(18-crown-6)(Si(SiMe 3 ) 3 ) 2 ][Ba(HMPA) 6 ][Si(SiMe 3 ) 3 ] 2 .…”

Syntheses and Structures of the First Heavy Alkaline Earth Metal Bis(tris(trimethylsilyl))silanides

“…Examples of well-characterized alkaline earth metal derivatives bearing heavy group 14 ligands are scarce and are mainly limited to magnesium. Examples include Mg(DME)(SiMe 3 ) 2 (DME = 1,2-dimethyloxyethane), Mg(THF) 2 Br(Si(SiMe 3 ) 3 ), Mg(THF) 2 (Si(SiMe 3 ) 3 ) 2 , Mg((CH 3 ) 2 NCH 2 CH 2 CH 2 N(CH 3 ) 2 )(SiMe 3 ) 2 , [Mg(TMEDA)Br(SiMe 3 )] 2 , Mg(TMEDA)(SiMe 3 ) 2 , and Mg(DME) 2 (GeMe 3 ) 2 . Examples of heavier alkaline earth metal derivatives exhibiting metal−ligand bonds are limited to a small number of germanides, namely, M(THF) n (Ge(SiMe 3 ) 3 ) 2 (M = Ca, Sr, n = 3; M = Ba, n = 4), prepared by this group, and stannides, including Ca(THF) 4 (SnMe 3 ) 2 and Ba(Sn(O t Bu 3 )) 2 (Cr(CO) 5 ) 2 .…”