正碳离子

在金属活性中心上，烷基芳烃遵循吸附脱氢的反应机理；在酸性中心上可能遵循H转移、链式正碳离子以及自由基机理。

On metal active sites the dealkylation reaction follows adsorption and dehydrogenation mechanism , while on acid sites the dealkylation follows hydrogen transfer mechanism , carbonium ion chain reaction mechanism or free radical mechanism .

研究结果表明，MIP技术反应过程中，催化循环链的引发主要是原料中烷烃质子化，产生五配位正碳离子，使链反应遵循单分子的质子化裂化反应机理。

The results indicated that the main initiating event was the generation of a penta-coordinated carbonium ion by the protonation of paraffin in the feedstock , and the following reactions took place via monomolecular mechanism .

C6~+正碳离子异构化的分子模拟

Molecular simulation studies on the isomerization of c_6 ~ + carbenium ions

结果表明，脱水后的离子液体仍然可以催化烷基化反应，液体产物的GC-MS分析结果支持正碳离子机理。

The results showed that the dewatered ionic liquid could still catalyze the alkylation , and the carbonium mechanism was established through the GC-MS analysis of the reaction liquid product .

能生成相对稳定的正碳离子和离去基团的反应物容易发生SN1，中心碳原子空间阻碍小的反应物容易发生SN2。

Can generate is relatively stable carbon-left groups and the response of vulnerable SN1 , central carbon atom space hampered the response of small-prone SN2 .

异丁烯在酸性催化剂作用下作为质子的接受体发生质子化反应，生成正碳离子；作为中间产物的正碳离子，再迅速同亲核试剂CH3O-反应，生成MTBE。

Iso-butene and methanol etherification proceeds according to the electrophilic addition mechanism , Iso-butene makes protonation reaction as the proton acceptor under the acid catalyst function , being born the positive carbon ion , intermediate products react rapidly with nucleophilic reagent ( CH3O - ) to produce MTBE .

正碳离子稳定性的量子化学研究

Study on the stability of the carbonium ions

应用正碳离子聚合的方法合成新型聚异丁烯遥爪预聚物。

The new telechelic prepolymers of polyisobutylene have been synthesized by the carbocationic polymerization .

同时，提出异丙苯和1，3，5-三异丙苯均以正碳离子机理进行裂化的。

Meanwhile , a carbenium ion mechanism was put forward for the cracking of1,3,5-TIPB .

应用计算机分子模拟技术考察了C+6正碳离子的异构化反应历程。

The isomerization reaction of C + 6 carbenium ions was studied by using molecular simulation techniques .

本文简要地介绍了国外正碳离子聚合机理新的观点和正碳离子聚合技术最新的进展。

This paper briefly introduced the new view of carbon cationic polymerization mechanism and its recent development abroad .

正碳离子在溶液中由溶剂效应获得更高的稳定性，而且在极性较高的介质中更容易形成。

Carbonium ions in solution derive much of their stability from solvation effects and are formed more easily in more polar media .

当噻吩处在催化裂化条件下，正碳离子反应活跃，易与烷烃裂化生成的α烯烃加成，进一步与烷烃发生氢转移饱和后裂化脱硫。

While thiophene molecules were under the catalytic cracking conditions , their carbonium ions were very active and reacted easily with α - olefins from the paraffin cracking reaction .

应用经典正碳离子反应机理合理简化催化裂化汽油的催化反应网络，建立了一种接近分子水平的集总反应动力学模型；

A molecular lumped kinetic model has been established based on the classic carbonium ions reaction mechanism to represent the FCC gasoline reaction network through reasonable hypothesis and simplification .

他还说在地球上正接收质子或碳离子新辐射疗法治疗的癌症患者也会从该放射量测定器收益。

Cancer patients here on Earth who undergo new forms of radiation therapy using protons or carbon ions , said Borak , could also benefit from the dosimeter .

其结果证实：在种种分子重排反应中，总是趋向于生成结构更稳定的碳正离子或碳负离子或自由基中间体及其产物。

Their result affirm : in all sorts of molecular rearrangement reactions , anyway tend to produce more stable carbocation , or carboanion , or free radical middle substance and their products .