principal product formed is not the expected cyclic organosilicon (or organogermanium) fluoride but the compound resulting from a transannular substitution reaction at the heteroatom with cleavage of one intracyclic heteroatom-carbon bond. The structures of the derivatives obtained were determined by 19F NMR and, after methylation, by mass spectrometry, 1H and 13C NMR, and chemically.
奥拉试剂(HF-
吡啶)在室温下容易与6,6-二甲基-6-sila-(和6,6-二甲基-6-germa-)-环
十一烷醇反应。在每种情况下,形成的主要产物都不是预期的环状有机
硅(或
有机锗)
氟化物,而是在杂原子上经环内取代反应并裂解一个环内杂原子-碳键而形成的化合物。所获得的衍
生物的结构通过19 F NMR以及在甲基化之后通过质谱,1 H和13 C NMR以及
化学方法来确定。