For the reason why optical activity of mesomer is counteracted classical answer was not convincing.

指出了内消旋体消旋原因传统理性。

For the reason why optical activity of mesomer is counteracted classical answer was not convincing. By use of the helix theory and stable staggered conformation answer can be obtained.

指出了内消旋体消旋原因传统理性。利用螺旋理论和稳定交叉式构象，理地了内消旋体消旋原因。