Cyanidosilicates-Synthesis and Structure

摘要

Starting from fluoridosilicate precursors in neat cyanotrimethylsilane, Me3Si-CN, a series of different ammonium salts [R3NMe](+)(R = Et, Pr-n, Bu-n) with the novel [SiF(CN)(5)](2-) and [Si(CN)(6)](2-) dianions was synthesized in facile, temperature controlled F-/CN- exchange reactions. Utilizing decomposable, non-innocent cations, such as R3NH](+), it was possible to generate metal salts of the type M-2[Si(CN)(6)] (M+= Li+,K+) via neutralization reactions with the corresponding metal hydroxides The ionic liquid [BMIm](2)[Si(CN)6] (m.p. = 72 degrees C, BMIm =1-butyl-3-methyli-midazoliunz) was obtained by a salt metathesis reaction. All the synthesized salts could be isolated in good yields and were fully characterized.