查询词典 cyclopentadiene

Cyclopentadiene monomer is not stable and undergoes spontaneous Diels-Alder addition to produce the dimer and higher polymers.

环茂二烯单体是不稳定的，它会自发进行Diels-Alder加成反应，产生二聚体和更高的多聚体。

The second set of complexes synthesized are based on 3-butenyl cyclopentadiene as〓Ln-Cl·2THF.

所得络合物为对空气和湿气敏感的具有较好流动性的油。

Is constructing has Mr. to come the square and the Wuxi world trade center as well as the deep cyclopentadiene industry building and 339 meter Kowloon warehouse building.

在建的有君来广场和无锡世界贸易中心以及深茂业大厦和339米的九龙仓大厦。

The conversion of cyclopentadiene and selectivity for methylcyclopentadiene were around 32 % and 86 %, respectively, over KNO3/γ-Al2O3 and KNO3/HT at 450℃.

在所考察的催化剂中，KNO3/γ-Al2O3和KNO3/HT的催化性能最好，在450℃时就能催化转化约32％的CPD，MCPD的选择性可达86％左右，高于传统固体碱MgO在500℃时的活性。

The process of preparation for 2-chloro-5-chlormethylpyridine by cyclopentadiene cyclization needs to do more research by using green process and decreasing the wastes.

2-氯-5-氯甲基吡啶的合成采用环戊二烯环合法，需研发有利于环境的绿色生产工艺，减少三废，治理三废。

ML of cyclopentadiene monomer. The monomer must be used immediately or the

作。确保在得到单体以前，氯化亚铁和氢氧化钾已准备好

The conversion of cyclopentadiene and selectivity for methylcyclopentadiene were around 32% and 86%, respectively, over KNO3/γ-Al2O3 and KNO3/HT at 450℃. Such catalytic activity was higher than that on MgO.

在所考察的催化剂中，KNO3/γ-Al2O3和KNO3/HT的催化性能最好，在450℃时就能催化转化约32%的CPD，MCPD的选择性可达86%左右，高于传统固体碱MgO在500℃时的活性。

Promotes the weak tree's growth to have to hold raises root this key, because only then the root is deep can the leaf cyclopentadiene.

促进弱树的生长必须抓住养根这个关键，因为只有根深才能叶茂。

All of these products have the carbon-carbon linkage to the cyclopentadiene ring.

由^1H NMR、IR、元素分析等确认R和环戊二烯上碳直接相连，具有典型的碳碳连结。

We fully realized "the root deep can the leaf cyclopentadiene" the philosophy, we fully realized own knowledge still had many insufficiencies, therefore we have established the goal which hoisted the sails to go to battle.

我们深知&根深才能叶茂&的哲理，我们深知自己的知识仍有许多的不足，于是我们确立了扬帆出征的目标。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。