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Topic: preceptationband recrystalization problem  (Read 2848 times)

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Offline GinaTageldin

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preceptationband recrystalization problem
« on: December 04, 2014, 10:07:29 AM »
i reacted ethyl aceto acetate with acid hydrazid in ethanol then after rx is complete ppt it by ice but it was a wax so tried to do it again in glavial acetic and it ppt on fridge while filtration and washing with glacial acetic acid most of the powder dissolved
othe reaction with avid hydrazide and di ethyl malonate in alchol no progression occur so o added acetic acid and the rx finidhed and i evaporated most of the solvent and couldn,t obtain the ppt or product althogh i adddd ice but no thing
finally reaction of acid hydrazide and acetyl acetone in alchol , also couldn,t obtain a ppt afeter evaporation  most of solvent and add ice
how i get all those pdt from the reaction mixture ? please help me and crystalization solvent could i use thanks☺☺☺☺

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