查询词典 hexene

Dihydrojasmone was synthesized from2-hexyl-5-methyl-1,2-oxaborolane,prepared frommethyl vinyl ketone and hexene,via the homologationwith 〓 followed by PCC oxidation and intra-molecular condensation.In stead of the oxidation ofthe C-B bond of 1,2-oxaborolane,fluoride inducedhalogenation of 2-alkoxy-1,2-oxaborolane was found togive 3-halopropanol.

硼氢化甲基乙烯基酮和已烯得到的2-已基-5-甲基-1，2-氧硼杂环戊烷与〓反应，再经PCC氧化，分子内缩合得到二氢茉莉酮。1，2-氧硼杂环戊烷的C-B键除氧化断裂之外，也能够在〓或KF作用下卤化断裂成碳卤键。

Although multidentate heteroatomic could catalyse high selectivity of α-olefin such as 1-hexene and 1-octene,these ligand usually use expensive co-catalyst such as MAO,so it hardly has broad application in α-olefin field.

但由于多齿杂原子配体一般需由价格相对昂贵的烷基铝氧烷，特别是MAO的活化才可进行高效催化反应，因此长期以来多齿型配体难以得到广泛应用。

Advances in ethylene selective trimerization catalysts, especially composition, activity and cost of trimerization catalysts and their overall selectivity to 1-hexene.

对乙烯选择性三聚反应进行了论述，着重分析了催化剂的组成、活性、成本和1-己烯的总选择性，并展望了烯烃选择性齐聚反应的发展。

Catalysts 1 and 2 were supported on silica particles and the effects of different supporting strategies on trimerization selectivity, 1-hexene incorporation efficiency and copolymerization activity were studied and compared to the homogeneous system.

使用均相或负载化HNC_2H_4SC_(12H_(25)_2·CrCl_3与均相或负载化Et_2ZrCl_2组合成的不同的串联催化体系进行乙烯的化学反应，研究发现，共聚催化剂Et_2ZrCl_2负载化对其活性和1-己烯的插入都有影响。

Due to the hemilability of the heteroaromatic functionalized cyclopentadienyl ligand, these complexes showed considerable activity and high selectivity for ethylene trimerization to 1-hexene.

由于这类芳香杂环-茂配体具有Hemilabile特性，因此，此类络合物显示了一定的乙烯三聚活性和高的三聚选择性。

The synthesis of the unbridged metallocene (2, 4-Me〓Ind)〓ZrCl〓, which is not found in reference. Polymerization of ethylene or propylene with the metallocene has high activity. The resulted ethylene/1-hexene copolymer characteristic of uniform comonomer distribution. The catalyst possess commercial value

合成了未见文献报道的非桥联茂金属（2，4-Me〓Ind）〓ZrCl〓，用这种茂金属催化乙烯或丙烯聚合均达到了很高的催化效率，所得的乙烯/1-己烯共聚物表现出共单体分布高度无序的特点，具有工业应用前景

Keywords tungsten trioxide;zirconia;solid acid;benzene;1-hexene;alkylation;potassium;strontium

氧化钨；氧化锆；固体酸；苯； 1-己烯；烷基化；钾；锶

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。