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- Nitramines are substances which contain a nitro group bonded to nitrogen. 含有与氮原子相连的硝基的物质称为硝胺。
- Complete transformation of the nitro group to chloropicrin takes place in the reaction. 硝基在反应中完全转变成氯苦。
- Nitro compound: Any of a class of chemical compounds in which the nitro group (-NO2) forms part of the molecular structure. 硝基化合物:分子结构中含有硝基(-NO2)的任何一类化合物。
- The spiropyrans with a nitro group at the benzopyran moiety showed reverse photochromic behavior, others were normal photochromic compounds. 在苯并吡喃部分含有硝基的螺吡喃显示出逆光致变色行为,其它的则为普通光致变色化合物。
- Synthesis of triclosan from 2,4 Dichlorophenol and 2,5 Dichloro nitrobenzene usually involves such procedure as etherization,reduction of nitro group,diazotization and hydrolysis. 其合成一般是以2,4二氯苯酚和2,5二氯硝基苯为原料,经过醚化、硝基还原、重氮化、水解等几步反应。
- Methods The product was synthesized from 1-(4-nitrophenyl)piperazine by Boc protection,reduction of nitro group,acylation,hydrazinolysis and cyclization. 方法以1-(4-硝基苯基)哌嗪为起始原料,经Boc保护、硝基还原、酰化、肼解、环合制得目标化合物。
- The results showed that o-nitro aryl ethers containing nitro group(-NO2)would become unstable in the alkaline medium,and nucleophilic substitution was easy to take... 发现邻硝基苯氧丙酸亲核取代的异常情况,推测可能是分子内邻基参与的亲核取代反应。
- Donors such as amine and phenolic groups,when positioned ortho to a nitro group,are always involved in intramolecular hydrogen bonding. 在硝基邻位上存在的氢键给体如胺基,酚基时,总与硝基形成分子内氢键。
- The various chemical ways of mutual conversion of amino and nitro groups were reviewed with 60 refercens. 综述了氨基与硝基相互转换的各种化学途径,并对其中的重要方法进行了讨论与评述。参考文献60篇。
- Education should not be restricted to any one specific age group. 教育不应限制在任何特定的年龄组上。
- Keywords activated carbon fiber;nitro group wastewater;chloramphenicol; 活性炭纤维;硝基废水;氯霉素;
- He broke away from that lawless group years ago. 他在几年前脱离了那个非法团体。
- The group of barbaric soldiers killed many people. 那群野蛮的士兵杀了很多人。
- The group was made up of doctors. 这个团体是由医生组成的。
- A group of boys dashed out of the classroom. 一群男孩子从教室里冲出来。
- I come upon a group of children play in the street. 我遇到一群孩子在街上玩耍。
- He goes about with a group of nice boys. 他经常和一群好孩子在一起玩。
- He is a the most brisk young man in this group. 他是这个小组中最活跃的年轻人。
- He showed me a photo of a family group. 他给我看一张合家欢的照片。
- The chief accountant of a manufacturing group. 一个制造业集团的总会计师。
