轮烯的螺旋结构和旋光性

本文讨论了轮烯类化合物的立体结构．从螺旋理论看，芳香轮烯和非芳香轮烯都是内消旋体和外消旋体的混合物，故都不呈现旋光性．但轮烯的衍生物t由于受碳架结构的限制，难以外消旋化，因此呈现旋光性．轮烯类化合物的旋光性也遵循右螺旋右旋．左螺旋左旋的螺旋规律。

The Helix Structure and Opticity Activity of Annulenes

In this paper the stereoscopic structure of annulene compounds are disscused. In the light of the helix theory, aromatic annulenes and unaromatic annulenes were all the mixture of the mesomer and raceme, so they havet't opticity activity. But owing to the limit of the crabonaceous framework and difficult of the raceme,so the derivatives of annulene show opticity activity. The optivity of annulene compounds abided by the helix law, that is, right handed helix is R-rotatory and left handed helix is L-rotatory.