Bis‐norbornene and bis‐cyclobutene with different kinds of linkers have been extensively used for the synthesis of double stranded ladderphanes under ruthenium‐ or molybdenum‐catalyzed ring opening metathesis polymerization (ROMP) conditions. The key to the success relies on the selective formation of comb‐like polynorbornenes or polycycloubtenes, where pendants are all aligned towards similar direction. This minireview summarizes various methods (chemical methods, spectroscopic means, and nonlinear optical measurements) for determining the comb‐like conformations of pendants on these rigid‐rod polymers. The approach is based on the proximal relationship between adjacent pendants. Interactions between these adjacent pendants would enable a change in chemical reactivity

中文翻译：

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刚性杆聚合物上吊坠取向的确定。

具有不同类型连接基的双降冰片烯和双环丁烯已广泛用于在钌或钼催化的开环复分解聚合（ROMP）条件下合成双链梯形烯。成功的关键在于选择性形成梳子状的聚降冰片烯或聚环戊烯，其中的链坠都朝着相似的方向排列。本微型综述总结了各种方法（化学方法，光谱学方法和非线性光学测量），用于确定这些刚性棒状聚合物上的侧基的梳状构象。该方法基于相邻吊坠之间的近端关系。这些相邻的侧基之间的相互作用将使化学反应性发生变化