Silicon-metal bonded compounds. 17. The synthesis and crystal structure of bis[tris(trimethylsilyl)aluminum]-tetramethylethylenediamine and of bis(trimethylsilyl)magnesium-tetramethylethylenediamine

Syntheses and Structures of the First Heavy‐Alkali‐Metal Tris(trimethylsilyl)germanides

“…The chemistry of alkaline-earth-metal derivatives bearing heavy Group 14 ligands has attracted attention [1][2][3][4][5][6][7][8][9][10][11][12][13] due to applications in synthetic and polymer chemistry. [9,14] While alkali-and alkaline-earth-metal silanides have been studied in some detail, [1,2,4,7,9,[15][16][17][18][19][20][21][22][23][24][25] little is known for the closely related, but more reactive germanides.…”

“…[9,14] While alkali-and alkaline-earth-metal silanides have been studied in some detail, [1,2,4,7,9,[15][16][17][18][19][20][21][22][23][24][25] little is known for the closely related, but more reactive germanides. [8,12,[26][27][28] Specifically, difficulties in the preparation of the alkali-metal germanides needed to access the alkaline-earth-metal analogues by metathesis are responsible for this slow development.…”

“…The silicon analogue of 6, [K(tmeda) 2 8). We also include the silanide analogue [K(pmdta) 2 Si(SiMe 3 ) 3 ] (9) for sake of comparison.…”

“…The silicon analogue of 6, [K(tmeda) 2 8). We also include the silanide analogue [K(pmdta) 2 Si(SiMe 3 ) 3 ] (9) for sake of comparison. The compounds were typically characterized by X-ray crystallography, and [{MSi(SiMe 3 ) 3 } 2 ], (M = Li, Na, K, Rb, Cs) was obtained by treatment of zinc, cadmium, or mercury silanides with the respective alkali metals.…”

Synthese und Molekülstruktur von [Al(SiMe3)3(DBU)] (DBU = 1,8-Diazabicyclo[5.4.0]undec-7-en)

“…Silylierte Aluminiumverbindungen, die erstmals 1977 von Ro È sch beschrieben wurden [1] [16]), von denen die Vertreter mit L = Et 2 O [14], NMe 3 [16] und die dimere Verbindung [{Al(SiMe 3 ) 3 } 2 (l-TMEDA)] (TMEDA = N,N'-Tetramethylethylendiamin) [15] Aufgrund des gro È ûeren sterischen Anspruchs von DBU, verglichen mit TMEDA oder NMe 3 , steht in 1 einem groûen C(9)±N (1) [Al(SiMe 3 ) 3 (DBU)] (1). Man gibt 20 ml einer 0,23 M Lo È -sung von [Al(SiMe 3 ) 3 (OEt 2 )] in Toluol (4,6 mmol) in einen 100 ml Kolben.…”