double bond

Compared with diolefine rubber,EPDM has less double bond.

与二橡胶相比,EPDM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重要反应之一,即双化合物在金属碳催化下关环得到环类化合物。

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β-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与聚乙阴离子反应过程中，GMA在活性种终端发生了聚合，所得产物中环氧端基与聚合产物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单元不饱和脂肪酸形成超氧O3化物。