问题：求PDC氧化剂怎么制备？？？
类型：求助 (悬赏分:3分)
提问：mp5001
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版块：有机化学问题(jimuwei,fpcwin1211,netpanda,yjgzfl,Ftian,)
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时间：2008-01-11 14:11:59 编辑加入/取消收藏订制/取消短消息举报该贴

求PDC氧化剂怎么制备？？？

回复人：tangyyer,★★★★★ (有空来逛逛my blog: http://tangyyer.blog.hexun.com) 时间：2008-01-11 21:16:40 编辑	1楼
参见： E. Corey and G. Schmidt, Tetrahedron Lett., 399 (1979).

回复人：tangyyer,★★★★★ (有空来逛逛my blog: http://tangyyer.blog.hexun.com) 时间：2008-01-11 21:18:19 编辑

2楼

Preparation of Pyridinium Dichromate：
The reagent was prepared by dissolving 25.0 g (0.25 mol) of CrO3 in 50 mL of distilled H20 and adding 20 mL (0.25 mol) of pyridine dropwise at 0℃. The color of the solution changed from deep purple to bright orange, and the product precipitated as a bright orange solid. The solution was further diluted with 100 mL of acetone, cooled to -30℃ and allowed to stand for 30 min. The precipitate was filtered, washed with acetone, and dried under vacuum to obtain 40.0g (88% yield) of pyridinium dichromate (mp 144-146 ℃).

[该帖子已被tangyyer在2008-01-11 21:18:38编辑过]

回复人：mp5001,▲ (新手上路) 时间：2008-01-12 14:18:24 编辑	3楼
谢谢了

得分人：tangyyer :3,

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