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dem-3882608銅蟲 (正式寫手)
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【求助】翻譯求助 已有9人參與
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the temperature of solution initially increased by ca. 15 oC ca 是什么東西? |
木蟲 (正式寫手)
金蟲 (小有名氣)

木蟲 (正式寫手)
木蟲 (正式寫手)
鐵桿木蟲 (著名寫手)
金蟲 (小有名氣)
銅蟲 (正式寫手)
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謝謝各位的關注 原文如下 Anhydride Synthesis:The acyl chloride (6.9 mmol) was added to a solution of 20 mL of previously dried benzene and dry pyridine (7.0 mmol) under nitrogen. Stirring was continued until 'a finely divided white precipitate was observed which indicated the formation of the reactive acyl halide-pyridinium complex. The reaction vessel waa placed in an ice bath at -10 oC and the carboxylic acid was added all at once. The temperature of the solution initially increased by ca. 15 oC, but returned to a lower temperature after stirring for an additional 20 min at -10 oC. The reaction mixture was filtered through Celite on a glass frit. The solvent was then removed in vacuo to yield product which was purified as indicated below. 對于The temperature of the solution initially increased by ca. 15 oC 不知是如何升高到15度的 |
木蟲 (著名寫手)
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