英语翻译掌握乙酰苯胺化学反应的原理和实验操作.且进一步熟悉用于固体有机物提纯的重结晶法.其原理是由于芳香族伯胺的芳环和氨基都容易起反应,在有机合成上为了保护氨基,往往先把乙

英语翻译掌握乙酰苯胺化学反应的原理和实验操作.且进一步熟悉用于固体有机物提纯的重结晶法.其原理是由于芳香族伯胺的芳环和氨基都容易起反应,在有机合成上为了保护氨基,往往先把乙
英语翻译
掌握乙酰苯胺化学反应的原理和实验操作.且进一步熟悉用于固体有机物提纯的重结晶法.
其原理是由于芳香族伯胺的芳环和氨基都容易起反应,在有机合成上为了保护氨基,往往先把乙酰基化为乙酰苯胺,然后再进行其他反应,最后水解去除乙酰基.
操作：在50mL圆底烧瓶中,防止10mL心蒸馏过的苯胺,15mL冰醋酸以及少许锌粉,装上一分馏柱,插上温度计,用一个支管试管手机蒸出的水和乙酸.圆底烧瓶放在石棉网上用小火加热回流,保持温度计读数于105℃约1h,反应生成的水及少量醋酸被蒸出,当温度下降则表明反应已经完成,在搅拌下趁热将反应物倒入盛有250mL冷水的烧杯中,冷却后抽滤,用冷水洗涤粗产品.将粗产品移至500mL烧杯中,假如300mL水,置烧杯于石棉网上加热使粗产品溶解,稍冷即过滤,滤液冷却,乙酰苯胺结晶析出,抽滤.

英语翻译掌握乙酰苯胺化学反应的原理和实验操作.且进一步熟悉用于固体有机物提纯的重结晶法.其原理是由于芳香族伯胺的芳环和氨基都容易起反应,在有机合成上为了保护氨基,往往先把乙
Acetanilide chemical reaction control principle and experimental operation. And more familiar for the purification of solid organic recrystallization.
The principle is as aromatic amines and amino aromatic ring are easy to react, in organic synthesis to protect amino, often into the first acetyl acetanilide, and then the other reaction, and finally hydrolysis to remove acetyl.
Operation: 50mL round bottom flask, to prevent heart of the distilled aniline 10mL, 15mL glacial acetic acid and some zinc powder, and put on a fractionation column, insert the thermometer, with a branch out of the water tube steam phone and acetic acid. Round bottom flask was refluxed on low heat asbestos-line, keep the thermometer reading at 105 ℃ approximately 1h, the reaction of water and a small amount of acetic acid was distilled out, indicates that the reaction when the temperature drops have been completed, stirring the reactants under the hot poured into a beaker filled with 250mL of cold water, the cooling filtration, the crude product washed with cold water. The crude product moved 500mL beaker, if 300mL of water, home heating beaker to asbestos the crude product dissolved online, coolish the filtrate cooled acetanilide crystallization, filtration.