The reaction of αpinene isomerization catalyzed by dealuminated USY(DUSY,SiO2/Al2O3=861)in the solvents of different dielectric constant was studied.The effect of reaction time and temperature on conversion...The reaction of αpinene isomerization catalyzed by dealuminated USY(DUSY,SiO2/Al2O3=861)in the solvents of different dielectric constant was studied.The effect of reaction time and temperature on conversion and product distrbutions in the different solvents was investigated.The experimental result shows that the reaction of αpinene isomerization was favored in polar tetrahydrofuran with a larger dielectric constant.展开更多
烷基是有机化合物中常见的基团,当它取代了氢原子后,究竟是吸电子还是供电子,对此曾引起一些争论。早在40年代初,有人就发现 C—H键偶极矩方向是 C—H,μ的数值约0.4D。在这之后30年内,先后有八家实验室证明了上述方向,定出了 H 的电负...烷基是有机化合物中常见的基团,当它取代了氢原子后,究竟是吸电子还是供电子,对此曾引起一些争论。早在40年代初,有人就发现 C—H键偶极矩方向是 C—H,μ的数值约0.4D。在这之后30年内,先后有八家实验室证明了上述方向,定出了 H 的电负性为2.1,CH3—为2.3,说明甲基有微弱吸电性。甲基及其它烷基的这种静电负诱导已有许多证明。展开更多
文摘The reaction of αpinene isomerization catalyzed by dealuminated USY(DUSY,SiO2/Al2O3=861)in the solvents of different dielectric constant was studied.The effect of reaction time and temperature on conversion and product distrbutions in the different solvents was investigated.The experimental result shows that the reaction of αpinene isomerization was favored in polar tetrahydrofuran with a larger dielectric constant.
文摘烷基是有机化合物中常见的基团,当它取代了氢原子后,究竟是吸电子还是供电子,对此曾引起一些争论。早在40年代初,有人就发现 C—H键偶极矩方向是 C—H,μ的数值约0.4D。在这之后30年内,先后有八家实验室证明了上述方向,定出了 H 的电负性为2.1,CH3—为2.3,说明甲基有微弱吸电性。甲基及其它烷基的这种静电负诱导已有许多证明。
