只有
发表于 2025-3-25 05:59:38
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LOPE
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Maximizer
发表于 2025-3-25 12:11:05
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割让
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Audiometry
发表于 2025-3-26 00:03:33
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Mingle
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点燃
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波动
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bizarre
发表于 2025-3-26 16:01:15
http://reply.papertrans.cn/35/3406/340534/340534_29.png
一美元
发表于 2025-3-26 18:26:41
The Possibility of Bond Fixation by Substitutionns could form a double bond in a preferred position relative to a substituent. This could be as in the 9,10-position in phenanthrene. The loss of aromatic (delocalization) energy would not be great. In fact, the aromatic energy declines in benzene derivatives.