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Ring closing metathesis (RCM) of dienes to cycloalkene provides an important tool for C-C double bond formation catalyzed by metal carbene.

关环应是形成碳碳双键的重应之一,即双烯化合物碳烯催化下关环得到环烯类化合物。

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Cycloalkenes also start at three carbons and get increasingly stable as more are added, though their double bonds make their molecules plainer instead of tetrahedral.

环烯烃也从三个原子开始, 并且随更多原子越来越稳定,尽管它们的双键使它们的分子更简单不是四面体。

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