发现烯丙基卤可以大幅度调节聚合物的分子量，对分子量分布也有一定的调节作用。
It is found that the allyl halide can considerably adjust the molecular weights, and also in some degree their distribution.
结果表明， 经氯化汞活化的金属钐对酮类化合物与烯丙基或苄基卤代物的反应很有效， 可高产率地生成叔醇。
Samarium metal (activated by HgCl2) is an effective reagent for allylation or benzylation of ketones. The corresponding tertiary alcs. are obtained in satisfactory yields.
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