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请教：氧化剂PDC的制备
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请问氧化剂PDC是如何制备的，及其相关信息。谢谢！ [ Last edited by darliu on 2008-11-4 at 22:01 ] |
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2楼2008-11-07 16:11:51
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darliu(金币+2,VIP+0):鼓励交流
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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 ℃). |
3楼2008-11-07 16:12:22