Tetrakis(tri‐tert‐butylsilyl)‐tetrahedro‐tetrasilan (tBu₃Si) ₄Si₄ — die erste molekulare Siliciumverbindung mit einem Si₄‐Tetraeder

Abstract

Das orangegelbe Tetrakis(supersilyl)‐tetrahedro‐tetrasilan 1, das erste Derivat des tetrahedro‐Tetrasilans Si4H4, ist gegen Wärme, Licht, Wasser und Luft stabil, wird von Natrium bis 70 °C nicht reduziert, läßt sich aber von Tetracyanethylen oder Brom oxidativ angreifen. 1 läßt sich nach Reaktion (a) in 57% Ausbeute herstellen.

Multiple Bonding Between Silicon and Molybdenum: A Transition‐Metal Complex with Considerable Silylyne Character

“…Efforts to prepare stable triple bonds to silicon have not yet been successful, although results from the work of Wiberg suggest that the disilyne [ t Bu 3 SiSiSiSi t Bu 3 ] may be an unobserved intermediate in a reaction which forms its dimer, the tetrasilatetrahedrane [( t Bu 3 SiSi) 4 ] 6. West's research group has also proposed the intermediacy of the disilyne species [(2,6‐Mes 2 H 3 C 6 )SiSi(C 6 H 3 ‐2,6‐Mes 2 )], which decomposes through the cleavage of two CC bonds in the terphenyl groups 7.…”

Zintl‐Ionen, Käfigverbindungen und intermetalloide Cluster der Elemente der 14. und 15. Gruppe

“…[Pn 7 R m ] (3− m )− , z. B. in Form von [Si 4 (SiMeDis 2 ) 3 ] − (Dis=CH(SiMe 3 ) 2 )152 und E 4 ( t Bu 3 Si) 4 (E=Si,153 Ge154) oder P 7 Me 3 191. Während beide Gebiete erst kürzlich getrennt voneinander zusammengefasst wurden,12, 13, 155, 156 sollen in unserem Aufsatz ihre Gemeinsamkeiten herausgestellt werden.…”

An Organosilicon Cluster with an Octasilacuneane Core: A Missing Silicon Cage Motif

“…[1] Therefore, synthetic studies on organosilicon clusters have been extensively developed. Persilapolyhedranes, [2][3][4] decasilaadamantane, [5] pentasila[1.1.1]propellane, [6] persila[n]staffane (catenated silicon cages), [7] and related siliconoids [8,9] have all been shown to possess unique electronic characteristics owing to developed s conjugation among the caged SiÀSi bonds. Octasilacuneane, a silicon analog of cuneane [10] (pentacyclo[3.3.0.0 2,4 .0 3,7 .0 6,8 ]octane), is a missing saturated silicon cluster motif, but potentially important because octasilacuneane is an isomeric silicon cage of octasilacubane, [4] one of the most well-known silicon polyhedra.…”