18419-53-9Relevant articles and documents
Targeted attachment of functional groups at Ge9 clusters: Via silylation reactions
Mayer,Schiegerl,Kratky,Günther,F?ssler
, p. 11798 - 11801 (2017)
Molecules with low-valent Ge atoms are generally synthesized from organohalogen germanes as precursors. The Zintl phase K4Ge9 provides reactive building blocks for a targeted synthesis of germanium-rich molecules. The silylation of Ge9 clusters with chlorosilanes ClSiR2R′, that carry unsaturated olefin groups R′ leads to the introduction of olefinic side chains of variable lengths allowing for further reactions. The compounds K[Ge9{Si(SiMe3)3}2(SiPh2R′)] (R′ = -CHCH2 (1); -(CH2)3CHCH2 (2)) carry one such functionality, whereas K[Ge9(SiPh2R′)3] (3 and 4) offer the possibility for an interconnection of clusters due to three functional groups on the Ge9 core. XPS measurements show that the silylated clusters are much more air-stable than the unsubstituted, bare cluster units.
Iron-catalyzed chlorination of silanes
Savela, Risto,Zawartka, Wojciech,Leino, Reko
experimental part, p. 3199 - 3206 (2012/06/04)
A simple and highly efficient iron-catalyzed method for the chlorination of silanes has been developed. By use of 0.5-2% of the Fe(III)-based catalyst FeCl3 or Fe(acac)3 in the presence of 1-1.5 equiv of acetyl chloride as the chlorine donor, a large number of silanes, alkoxysilanes, and silanols were converted to the corresponding chlorosilanes in 50-93% yields. In contrast to earlier reported methods often suffering from expensive catalysts or use of stoichiometric metal salts, hazardous reagents, and reaction conditions, the presently described methodology allows benign reaction conditions and simple workup while using only catalytic amounts of a readily available and economically viable iron catalyst.