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- 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。
- 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。
- 5.In this paper, three alkyl substituted dimethyl phosphonates have been synthesized by trimethyl phosphite with 1-Bromopentane, 1-Bromohexane and 1,2-Dibromoethane. 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。
- 2.In this paper, three alkyl substituted dimethyl phosphonates have been synthesized by trimethyl phosphite with 1-Bromopentane, 1-Bromohexane and 1,2-Dibromoethane. 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。
- The coach substituted Smith for Jones. 教练让史密斯上场，换下了琼斯。
- Tom substituted for the injured player. 汤姆替换了那个受伤的运动员。
- The understudy was substituted when the leading actor fell ill. 主角演员患病，由替角代替演出。
- Keywords Ketone compounds;Alkyl substitution;Ultraviolet spectra; 酮类化合物;烷基取代;紫外光谱;
- alkyl substituted [机] 烷基取代了的
- A striker was substituted for a midfield player in the last half-hour of play. 在比赛的最后30分钟里，一个中场运动员被一个强攻手替换了下去。
- We substituted a red ball for blue to see if the baby would notice. 我们用红皮球换下了蓝皮球，看这婴儿会不会发觉。
- Alkyl halides are reacted with sodium nitrite. 卤化烷与亚硝酸钠反应。
- Home-made parts are being substituted for imported ones. 国产零件取代进口零件。
- Alkyl bromides can be produced this way. 溴化烷可以这样形成。
- She substituted margarine for butter. 她用人造的奶油代替黄油。
- He substituted as the typist in the office. 他代替做这个办公室的打字员。
- 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
- 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
- We had to eat some potatoes substituted as a meal. 我们只得吃了几个马铃薯充饥。
