double bond

Compared with diolefine rubber,EPDM has less double bond.

与二胶相比,EPDM的双键很少。

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

关环转换反应是形成碳碳双键的重要反应之一,即双化合物在金属碳催化下关环到环类化合物。

Ethyl phenylacrylate intermediate bringing a double bond was introduced first,which is subsequently transformed into triketone and then DCM was obtained with high purity.

采用具有架的β-苯基丙酸酯为中间体先引入双键,再经过三酮合环制备乙基吡喃。

Results indicate interestingly that the double bond of GMA polymerized with polystyryl carbanion and the molar ratio of epoxy end group and polystyrene oligomer can be adjusted.

在GMA与聚苯乙阴离子反应的过程中，GMA在活性种的终端发生了聚合，所物中环氧端基与聚合物的摩尔比可根据需要进行调节。

Interestingly, in spite of its instability, the O3 molecule can be stabilized as an ozonide between the double bonds of a monounsaturated fatty acid such as oleic acid.

有趣的是，尽管不稳定，超氧O3分子却能以双键结合安定于像油酸那样的单元不饱和脂肪酸形成超氧O3化物。