当前位置: 首页 > 有机 >【求助】急求有效活化锌粉的简便方法

【求助】急求有效活化锌粉的简便方法

作者 panjie
来源: 小木虫 300 6 举报帖子
+关注

本人在做实验过程中发现锌粉有部分被氧化,使反应产率降低。现在想请教某位大哥告诉我一个有效的简便活化锌的方法!感激之至! 返回小木虫查看更多

今日热帖
  • 精华评论
  • panjie

    请尽量讲解得详细点!谢谢了!

  • 有机化学2005

    稀盐酸搅拌 然后乙醚洗两次

  • shonefone

    加入1 mol/L 的盐酸,
    室温下搅拌一会后过滤。
    固体在用丙酮洗,油泵抽干就能用了

  • panjie

    如果加入盐酸会不会产生大量气泡,而且会很剧烈啊?过滤抽干了,会不会都吸附在滤纸上?谢谢了!

  • 邢军伟

    当然会产生气泡了!采用玻璃真空漏斗可以减少吸附

  • daxinyang

    The Activated Method for Zinc Powder
    Method 1:  Zn powder (100 g) and water (0.9 L) were placed into
    a 1-L Erlenmeyer flask equipped with a stir bar. Concd HCl (10 mL)
    was added with stirring over 1 min. The slurry was stirred for 20
    min and the water was decanted. The metal was washed with water
    (3 × 250 mL), acetone (3 × 150 mL), and Et2O (2 × 100 mL). The
    metal was then transferred to a flask equipped with a vacuum take-
    off and dried under full vacuum for 3 h.
    Method 2: In a flame-dried round-bottom flask fitted with magnet-
    ic stir bar, dropping funnel, and N2 inlet, zinc powder was placed
    and the flask was flushed with anhyd N2. Then 1,2-dibromoethane
    (0.1 mL, 2 mL THF) was added and the reaction mixture was heated
    to 65 °C until the solvent began to reflux. A few minutes (ca 2 min)
    later it was cooled and trimethylchlorosilane (0.1 mL, 1 mL THF)
    was added. The solution was stirred at r.t. for 15 min and the organic
    solvent was evaporated.
    ref  Synthesis 2005, No. 17, 2838–2844,

猜你喜欢
下载小木虫APP
与700万科研达人随时交流
  • 二维码
  • IOS
  • 安卓