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芳胺的顺法重氮化

名词解释题
2021-12-30 06:40
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正确答案
指碱性较强的芳胺重氮化时,一般先将芳胺溶于稀酸中,然后在冷却的条件下,加入亚硝酸钠溶液的重氮化方法。

试题解析

标签: 染料 化学工程
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芳胺的酰化在有机合成中有着重要的作用,主要体现在((____))以及((____))两个方面。 [ 2 分
顺法重氮化是指重氮化时,先将芳胺溶于稀酸中,然后再冷却的条件下,加入亚硝酸钠溶液。
反式重氮化是指将等相对分子质量的芳胺和亚硝酸钠混合后,加入到盐酸(或硫酸)和冰的混合物中,进行重氮化。
分光光度法测定水中亚硝酸盐氮,通常是基于重氮偶联反应,生成橙色染料。
染料根据其来源可分为()和合成染料两种。染料可以按化学结构分类,如偶氮染料、蒽醌染料、三芳甲烷染料、靛类染料、硫化染料等。
芳胺的顺法重氮化
芳胺的逆法重氮化
Mainly east 3 or 4 partly cloudy to overcast occasional rain()slowly south moderate or good.
()any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local quarantine officer must be notified immediately.
Should any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local Quarantine Officer must be()immediately.
Masters are()solely responsible for all damages or accidents of whatever kind resulting from the navigating or handling of their vessels by day or by night.
重氮化是芳香族伯胺与亚硝酸作用生成重氮化合物的化学过程。
系统中雷达状态包括Unknown、Operational(or ON)、Failed(or OFF)、Detached。
The carrier is liable for loss of or damage to the goods or delay in delivery caused by fire,()the claimant proves that the fire arose from fault or neglect on the part of the carrier,his servants or agents.
Shutdown price(or point,or rule) 停业价格(或停业点、停业原则)
翻译:With Average or With Particular Average(WA or WPA)()
在重氮化反应中,酸量必须适当过量。酸过量的多少取决于芳伯胺的碱性。碱性越弱,过量越多。
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