The betaine will collapse to the alkene only when these two functions are eclipsed . 只有当这两个基团移至重迭位置时碘盐才能裂解为烯烃。
With the higher olefins, stabilization of the energetic intermediates occurs more easily . 在较高的烯烃情况下,高能的中间物稳定作用更易出现。
It provides a useful vehicle for transforming unsaturated acids to their corresponding alkenes . 它为使不饱和酸变成相应的烯烃提供了一个有用的中间体。
And similar methods have been used for the estimation of trans-olefines in lubricating oils and in gasoline . 类似的方法也用于估算润滑油和汽油中反式烯烃的含量。
Toward this end, the olefin 51 was treated with cyanogen azide and, indeed, produced the ring expanded ketone 52 . 为了证明这一看法,他用氰化迭氮处理烯烃(51)就得到扩大的环酮。
The compounds are prepared by the epoxidization of dinitrofluoromethyl olefins with peroxytrifluoroacetic acid . 这种化合物,由二硝基氟甲基烯烃与过氧化三氟醋酸进行环氧化反应而得到。
The hydrogenation of olefins affords an example where both heterogeneous and homogeneous catalyses are effective . 烯烃的加氢反应就是这样的一个例子,对它说来均相催化和多相催化都是有效的。
The study included polyamides, polyolefins, cellulosics, halogenated fibers, polyesters, acrylics and polyurethanes, 上述研究样品包括聚酰胺、聚烯烃,纤维素,含卤素等纤维,聚酯,聚丙烯腈和聚氨基甲酸纤维。
Weather - resistant polyolefin - covered wire and cable 抗风化聚烯烃包覆电线和电缆
Mixed polyolefin fibre ropes ; german version en 14687 : 2004 混合聚烯烃纤维绳索