定制各类格氏试剂

问题:求助文献一篇,谢谢
类型:求助 (悬赏分:3分)
提问:lajiao527
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版块:有机化学问题(jimuwei,fpcwin1211,netpanda,yjgzfl,Ftian,)
信誉:69%
回复:4
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时间:2007-09-22 18:02:31  编辑    加入/取消收藏    订制/取消短消息    举报该贴    

间硝基苯甲醛被还原为间氨基苯甲醛盐酸盐用什么还原剂好,有没有相关的文献
回复人:afc,★★ (氟化学产品) 时间:2007-09-22 19:40:11   编辑 1楼
A solution of 450 g. (2 moles) of stannous chloride crystals in 600 cc. of concentrated hydrochloric acid is placed in a 3-l. beaker provided with an efficient mechanical stirrer and cooled in an ice bath. When the temperature of the solution has fallen to +5°, 100 g. (0.66 mole) of m-nitrobenzaldehyde is added in one portion. The temperature rises slowly at first, reaching 25–30° in about five minutes, then rises very rapidly to about 100°. Stirring must be vigorous or the reaction mixture may be forced out of the beaker During the reaction the nitrobenzaldehyde dissolves, and an almost clear, red solution is obtained. The solution is cooled in an ice-salt mixture until the temperature has fallen to about +2°. During the cooling, orange-red crystals separate and a pasty suspension results.



回复人:lAJIAO527, () 时间:2007-09-24 22:05:07   编辑 2楼
已经打分了!


回复人:lAJIAO527, () 时间:2007-09-24 22:11:45   编辑 3楼
我按照此方法做的,可是盐酸盐返碱后,产生大量的乳化现象,这是由于氯化亚锡产生的吧,那么出来的橘红的固体不一定都是盐酸盐喽!


回复人:lajiao527, () 时间:2007-09-27 12:10:03   编辑 4楼



得分人:afc:1,


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