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[求助]
求高手翻译一下 谢谢
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| The reaction mixture was refluxed (30min for ethyl acetate and 20 min for diethyl carbonate) under microwave heating (magnetron power of 400W for ethyl acetate and 450 W diethyl carbonate). The clear reaction mixture was cooled at 5 ◦C for 4–5 h. Formed white precipitate was separated by filtration and dried to give 990 mg (94%) for ethyl acetate and 1.0 g (95%) for diethyl carbonate of succinimide |
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To an ethyl acetate (15 ml) or diethyl carbonate (10 ml) solution of 4-bromotoluene (1 g, 5.9 mmol), was added benzoyl peroxide (5 mg; 0.02 mmol, 0.34 mol %) andN-bromosuccinimide (1.89 g, 10.6 mmol, 1.8 equivalents). The reaction mixture was refluxed (30min for ethyl acetate and 20 min for diethyl carbonate) under microwave heating (magnetron power of 400Wfor ethyl acetate and 450 W diethyl carbonate). The clear reaction mixture was cooled at 5 ◦C for 4–5 h. Formed white precipitate was separated by filtration and dried to give 990 mg (94%) for ethyl acetate and 1.0 g (95%) for diethyl carbonate of succinimide. The filtrate was then evaporated under vacuum, to obtain a powdery material, which was purified by silica gel column chromatography with hexane–ethyl acetate (1 : 4) as an eluent. The isolated yield of 1- bromo-4-bromomethylbenzene is 1.33 g (90%) for ethyl acetate and 1.40 g (95%) for diethyl carbonate as reaction media. 整个段落是这样，乙酸乙酯还是碳酸酯是不是反应中的溶剂？ |
4楼2011-09-28 08:03:00
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至尊木虫 (职业作家)
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【答案】应助回帖
★ ★ ★ ★ ★ ★
爱与雨下(金币+1): !~ 2011-09-27 16:57:34
cch_cxy(金币+10): 谢谢 2011-09-28 09:54:13
爱与雨下(金币+5): bb代发！ 2011-10-04 08:16:07
爱与雨下(金币+1): !~ 2011-09-27 16:57:34
cch_cxy(金币+10): 谢谢 2011-09-28 09:54:13
爱与雨下(金币+5): bb代发！ 2011-10-04 08:16:07
| The reaction mixture was refluxed (30min for ethyl acetate and 20 min for diethyl carbonate) under microwave heating (magnetron power of 400W for ethyl acetate and 450 W diethyl carbonate). 反应混合物在微波加热下回流。The clear reaction mixture was cooled at 5 ◦C for 4–5 h. 澄清的反应混合物在 5 ◦C冷却4-5小时。Formed white precipitate was separated by filtration and dried to give 990 mg (94%) for ethyl acetate and 1.0 g (95%) for diethyl carbonate of succinimide 形成的白色沉淀通过过滤加以分离，干燥后分别得到琥珀酰亚胺990mg（在乙酸乙酯中回流和1.0g（在碳酸二乙酯中回流）。 |
2楼2011-09-27 16:53:16
3楼2011-09-28 08:00:14
【答案】应助回帖
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爱与雨下(金币+1): ！~ 2011-09-28 08:30:09
cch_cxy(金币+10, 翻译EPI+1): 谢谢 2011-09-28 09:54:00
爱与雨下(金币+5): bb代为发放！ 2011-10-04 08:16:29
爱与雨下(金币+1): ！~ 2011-09-28 08:30:09
cch_cxy(金币+10, 翻译EPI+1): 谢谢 2011-09-28 09:54:00
爱与雨下(金币+5): bb代为发放！ 2011-10-04 08:16:29
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根据(30min for ethyl acetate and 20 min for diethyl carbonate) 以及(magnetron power of 400W for ethyl acetate and 450 W diethyl carbonate)两个括号内的内容来看，用乙酸乙酯和碳酸二乙酯肯定是分别进行的，分别进行提取。突然出现一个The clear reaction mixture，让人迷惑，难道是将两种提取液混合一块啦。这需要前后文的确定。 后面的冷却是个结晶析出提取物的过程。过滤干燥后，应该是分成了两份，990mg溶于乙酸乙酯，1g溶于碳酸二乙酯。(94%) 和(95%) 也有点不明白，是质量分数吗？ 最后的of succinimide 应该是两个溶剂当中含有琥珀酰亚胺。 个人感觉，这个实验是要去用气质分析两个提取物的成分，琥珀酰亚胺是作为内标用。 楼主自己再根据前后文斟酌一下。 |
5楼2011-09-28 08:28:58
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