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[求助]
請(qǐng)問(wèn)后一句怎么去理解呢,到底是要不要在甲醇里面結(jié)晶呢?應(yīng)該怎么結(jié)晶呢,在線等
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(VI) was prepared by reacting equimolar portions of l,l0-phenanthroline hydrate and bromoacetaldehyde 2,4-dinitrophenyl-hydrazoner z in benzene soln at 60° for 1 hr with vigorous agitation. The yellow salt, m.p. 196-200” (with dec), yield =92%, which precipitated was collected after 3 days and was used in the next stage of the synthesis without further purification. It was difficult to crystallize but an analytical sample of the monohydrate was obtained from aqueous MeOH as yellow crystals, m.p. 205-208” (with dec).![]() |
至尊木蟲(chóng) (文壇精英)
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是從甲醇里結(jié)晶后測(cè)的熔點(diǎn) 發(fā)自小木蟲(chóng)Android客戶(hù)端 |
至尊木蟲(chóng) (文壇精英)
至尊木蟲(chóng) (文壇精英)
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