英语语法分析

The fold in the chain is completed using only 3 or 4 monomer units with bonds in the gauche conformation.

链中的折叠仅使用3或4个具有 gauche 构象键的单体单元完成。

The six-membered rings exhibit slightly distorted chair, extremely distorted chair and half-chair conformation respectively.

六元环分别呈现微扭曲的椅式构象、严重扭曲的椅式构象及半椅式构象。

The ORTEP diagram shows that the cation adopts an eclipsed conformation in the solid state.

从奥尔特普图可以看出，阳离子在固态时呈重叠式构象。