terminal carbon

An improved method for the palladium catalyzed carbonylation of terminal acetylenes using supercritical carbon dioxide as the reaction medium has been developed.

研究了以超临界二氧化碳为反应介质实现改善钯催化炔烃羰基化反应绿色性的方法。

The terminal of this system was the biological activated carbon, it could be removal COD and chroma of the emerge water from contact oxidation pillar effectively, to make the wastewater effluent measure up to the industrial standards basically.

工艺末端的生物活性炭深度处理可以有效地去除好氧出水的COD和色度，使得出水基本接近工业废水排放标准。

Comparing the~ ( 31) PNMR,~ ( 13) C NMR and DEPT of reactant with those of ring-opening products, we reached the conclusion that the nucleophilic opening ring occurred at the terminal carbon having less stereo-hindrance.

通过比较反应物和产物31PNMR，13c NMR及DEPT，得出了开环反应是发生在五元环的端碳原子上。

The effects of co-solvent, pressure, and temperature on the palladium-catalyzed carbonylation of terminal acetylenes in supercritical carbon dioxide has been studied.

在超临界二氧化碳介质的钯催化末端炔烃羰基化反应中，研究了助溶剂、压力和温度等因素对反应的影响。

The result indicates that terminal carbon concentration will decrease with decreasing the initial carbon concentration or increasing the initial oxygen concentration;

计算结果表明：降低初始碳含量、增大初始氧含量可使脱碳终点碳含量降低；

Palladium-Catalyzed Carbonylation of Terminal Acetylenes in Supercritical Carbon Dioxide

超临界二氧化碳介质中钯催化末端炔烃羰基化反应的影响因素

The third is concerted one. The theoretical study results show that the favorite exo and endo reaction paths of 1,3-cyclohexadiene with propylene are the stepwise processes via biradical intermediates, in which the terminal carbon of propylene attacks 1,3-cyclohexadiene at the first step.

经计算研究表明：1,3-环己二烯与丙烯生成exo和endo产物的有利途径为经过一个双自由基中间体的分步过程，由丙烯端位碳原子先进攻的分步过程最为容易。

The major metabolic pathways involved oxidation of the pentyl side chain to alcohols and acids with sequential cleavage of the terminal carbon.

主要代谢途径为：戊基支链末端的碳原子连续裂解而氧化为醇和酸。