Hydrides silanes

Silicon hydride (Silane) (SiH4) Explosive Rapid... 

The boron hydrides, silanes, phosphines, and most other covalent hydrides bum readily, some even being spontaneously flammable. 

Triorgano-hydrid-silane verhalten sich dagegen unterschiedlich, mit Li (53) oder Silyl-Li (90) ist die Disilan-Synthese zu erreichen, wahrend mit Silyl-K vorwiegend eine Reaktion im Sinne der Gleichung... 

For instance, the reaction of EtaSiH and 2 equiv. of p-methoxystyrene in toluene with 1.0 mol% of 16a afforded at 100°C within 6 h the dehydrogenative silylation product ( )-l-(p-methoxystyryl)-2-(triethyl-silyl)ethylene in 95% yield. The reaction is of high selectivity that neither (Z)-isomers, nor branched dehydrogenative silylation products were seen. Less hydridic silanes, such as triphenylsilane, were less efficient than for instance EtsSiH. Other substituted styrenes such as p-methyl, p-chloro-, and p-fluorostyrene also afforded the corresponding tran -vinylsilanes in high yields and selectivities (up to 98%). In the case of aliphatic alkenes, such as -octene, allyltriethoxysilane, vinylcyclohexane, and ethylene, dehydrogenative silylations were still preferred, but showed less E/Z selectivity. Cyclic olefins, such as cyclooctene, furnished low conversions under the same reaction crmditions. The results are summarized in Scheme 19. 

The synthesis of hydrides. Silane (SiH4) is made in a LiCl/KCl eutectic mixture ... 

Triethylaluminum/sodium hydride Silanes from ehlorosilanes... 

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