Crystal structures are reported for three new sulfonyloxiranes 5, 6b and 7. Taken together with the structures previously reported for the two sulfonyloxiranes 1 and 2, these structures provide evidence of the existence of a generalised anomeric effect in 2-phenylsulfonyloxiranes, accounting for the substantial bond asymmetry in the oxirane ring, and thus for the reactivity of these oxiranes towards nucleophiles.
报告了三种新的环氧磺酰 5、6b 和 7 的晶体结构。这些结构与之前报告的两个环氧磺酰 1 和 2 的结构相结合,证明了 2-苯基环氧磺酰中存在普遍的同分异构效应,从而解释了
环氧乙烷环中大量键不对称的原因,也解释了这些
环氧乙烷对亲核物的反应活性。