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【答案】应助回帖
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★ ★ ★ ★ ★ ★ ★ ★ ★ parins: 金币+4, 翻译EPI+1, ★有帮助, 感谢 2015-08-07 15:19:30 parins(RXMCDM代发): 金币+5 2015-08-15 21:41:57
比较配合物9 与 其他 配合物,酸的 配位点 越多,越容易 链接金属原子 形成 簇;比较配合物1,2,4 和 配合物3,5,6,10, 羧基 的位置 明显 会 影响 螺旋的 形成,间位 羧基 容易形成 螺旋,对位的 羧基 不容易 形成 螺旋,比较3 和4,取代基的 位阻效应 同样 会影响 螺旋的 形成,由于 叔丁基的 位阻 大于 -Br, 所以 位阻越大,越 不容易形成 螺旋。
Comparing the coordination compound 9 with other coordination compounds, we can see the more the acid coordination sites are, the more easily the metal atoms will be linked into atom cluster; Comparing the coordination compounds 1,2,4 with the coordination compounds 3,5,10, we can see the position of carboxy group will significantly affect the formation of helix, wherein ,the meta-position carboxy tends to form helix easily, while para-position carboxy does not; Comparing coordination compound 3 and 4, it can be seen that the steric effect of substituent group also affects the formation of helix. Since the steric effect of tertiary butyl is bigger than that of -Br, the bigger steric effect normally represents a bigger difficulty in forming helix. |
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