ring hydrogen

Results suggested that the four-membered ring of nopyl acetate cleaved first, then hydrated. Other products were mainly obtained from epoxidation of the double bond, and further oxidation of tertiary hydrogen on C_ (-1) and C_ (-5).

对反应产物的分析结果表明：反应主要是四元环开裂，并进一步水合，另外伴有少量双键环氧化的产物，这些环氧化的产物还可进一步在C-1和C-5处发生叔氢氧化。

Study of Nucleophilic Substitution Reaction of C-F Bond on a Benzene Ring under Activation of Hydrogen Bond PREPARATION OF CHITOSAN IMMOBILIZED WITH β-CD AT C_6 POSITION BY A NUCLEOPHILIC DISPLACEMENT REACTION

氢键活化的苯环上C-F键的亲核取代反应研究亲核取代法制备壳聚糖6-OH固载环糊精衍生物

Ordered structures in nature aggregates many senior composition dependence of weak intermolecular interaction, such as hydrophobic interactions, electrostatic interactions, hydrogen bonding, van der Waals, aromatic ring stacking and so on.

自然界很多高级有序结构聚集体的构成依赖分子间的弱相互作用力，例如疏水相互作用、静电相互作用、氢键、范德华力、芳环叠加等。

the reason why the bezene-ring hydrogen atoms are easier to be substituted than that of hydroxy group for the molecule phenol

苯酚的羟基难被取代而其苯环上的氢原子却易被取代的原因