2097| 3
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请问1,2-二氯环己烷的顺式和反式能否用核磁判断? |
发表于 2009-12-5 09:12:30
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发表于 2009-12-5 09:13:15
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发表于 2009-12-5 09:14:40
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发表于 2009-12-9 03:25:47
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