From the fact that its acidity is onyly pK 0.6 stronger than that of its carbon analogue it is concluded that aromatic “through-conjugation” does not play an important role in this system. This conclusion is discussed in the context of current ideas and evidence on dπpπ bonding at silicon.
用环己酰胺
铯在
环己胺中测定9,10-二氢-9,9-二甲基-10-苯基-9-
硅蒽的平衡酸度;p K的值为27.4。根据其酸度仅比其碳类似物强p K 0.6的事实,可以得出结论,芳香族的“通过共轭”在该系统中不发挥重要作用。这一结论是在当前的思想和证据的上下文中讨论d π p π在
硅键合。