硅三氢化钾或甲硅烷基钾是一种无机化合物,化学式为KSiH3,由K+和SiH3−构成[1],它可由金属钾和甲硅烷在低温反应制得。[2]在萘的存在下进行该反应(295 K,溶剂1,2-二甲氧基乙烷),除了硅三氢化钾外,还会生成硅二氢化二钾(K2SiH2)。[3]
它和碘甲烷反应,可以得到甲基硅烷;[4]和氯化苄反应,得到苄基硅烷。[5]它遇水水解:[5]
- KSiH3 + 5 H2O → KOH + 4 H2 + Si(OH)4
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