The electron population on the imino-nitrogen atom is the largest, thus the mercuric acetate should first coordinate with imino-nitrogen atom in the process of the reaction and then subsequent electrophilic substitution takes place in the ortho-position of the. 分子中亚胺氮原子的电荷密度最大,在汞化反应过程中,亚胺氮原子首先与醋酸汞配位,然后再进行邻位亲电进攻,生成邻位汞化产物;
After chlorine is introduced into the ortho-position of aniline, the polymerization rate of the monomer decreases markedly, the formed polymer is hydrolyzed easily. 结果表明,苯胺的氨基邻位上引入氯后,单体的电化学聚合速率显著下降,形成的聚合物更易水解。
The catalyze mechanism of HRP, HRP-catalyzed synthesis of ortho-position or para-position replacing polyaniline, the immobilization methods of HRP and the immobilized HRP-catalyzed synthesis of polyaniline were also introduced. 对HRP的催化机理、HRP催化合成邻位和对位的聚苯胺、HRP的固定化方法以及用固定化的HRP催化合成聚苯胺做了介绍。
Owing to the ortho-position hydrogen atoms on two hydroxyl groups of chromotropic acid are easily to be substituted by azo groups, a series of monoazo and bisazo derivatives can be obtained. 铬变酸偶氮类试剂的母体为铬变酸,由于铬变酸分子中2个羟基邻位的氢易被偶氮基所取代,因而可以得到一系列的单偶氮和双偶氮衍生物。
Chelate reaction between borate ions and phenol hydroxyl group, ortho-position hydroxymethyl group of phenol-formaldehyde resol resin 硼酸根与甲阶酚醛树脂中酚羟基和邻位羟甲基的螯合反应