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- A unique nitration reaction on phenyl rings is reported by mediation solely with Al(NO3)3 as a nitrating agent, proceeding in a way of electrophilic alkyl substitution. 摘要报道了一例特殊的苯环硝化反应：在硝酸铝作为硝化试剂的条件下，硝化反应是发生在取代烷基与硝基之间而不是苯环上质子与硝基之间。
- Keywords Ketone compounds;Alkyl substitution;Ultraviolet spectra; 酮类化合物;烷基取代;紫外光谱;
- In this paper, three alkyl substituted dimethyl phosphonates have been synthesized by trimethyl phosphite with 1-Bromopentane, 1-Bromohexane and 1,2-Dibromoethane. IR, 1H-NMR and 13C-NMR data of these compounds have been reported. 摘要以溴戊烷、溴己烷、1,2-二溴乙烷和亚磷酸三甲酯为原料，分别合成了戊基、己基、溴乙基取代的三种膦酸二甲酯化合物。并报道了所合成的化合物的红外光谱、核磁共振氢谱及核磁共振碳谱的数据。
- Keywords alkyl substitution;[14]annulene;[18]annule ne;porphine;isomers;enumeration; 烷基取代;[14]轮烯;[18]轮烯;卟吩;异构体;计数;
- We use saccharin in substitution for sugar. 我们用糖精代替糖。
- alkyl substitution 烷基取代
- Alkyl halides are reacted with sodium nitrite. 卤化烷与亚硝酸钠反应。
- Alkyl bromides can be produced this way. 溴化烷可以这样形成。
- To add one or more alkyl groups to(a compound. 使烷基化在（一种化合物）中添加一个或多个烷基团
- Substitution of a new obligation for an old one. 更新新契约对旧契约的替代
- To add one or more alkyl groups to(a compound). 使烷基化在（一种化合物）中添加一个或多个烷基团
- The substitution of coal for oil is desirable. 以煤代替石油是可取的。
- A substitution, an exchange, or an interchange. 交换代替、交换或互换
- The substitution of the phoneme/l/ for/r/ . 错把1音发成r。
- Most programs can make a reasonable substitution. 大多数程序员可以找到更合理的替代方式。
- The South Korean coach requests substitution. 韩国队教练要求换人。
- To do this, we ll use the substitution command. 要这样做,将使用替代命令。
- An equal exchange or substitution. 替代物:一种平等的交换或替代。
- They're studying a substitution for the medicine. 他们正在研制一种该药的替代品。
