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Ketene intermediates and their applications in asymmetric cycloaddition reaction .

烯酮中间体及其在不对称环加成反应中的应用。

Depending upon reaction conditions , the product may be a polyketone formed b y addition polymerization of the ketene double bond .

随着反应条件的不同，产物可以是由烯酮的双键加成聚合得到的聚酮。

Ketenes , notably dimethyl ketene , readily undergo oligomerization and polymerization .

烯酮，特别是二甲基烯酮，很容易齐聚和聚合。