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| 我们原认为产物的结构如3a， C=N双键处于环内。产物的X-单晶衍射（图 晶体数据）却显示N(1)-C(1)的键长为1.363 Å，而N(2)-C(1)的键长为1.288 Å，比N(1)-C(1)的键长短。根据文献，C=N双键的键长为1.279 Å，而CN单键的键长为1.339 Å。因此，N(1)-C(1)实际上是单键，而N(2)-C(1)为双键，即C=N双键处于环外，结构如4a（图）。 |
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考博求助
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huangpeipe(金币+6, 翻译EPI+1): 说实话，不行，呵呵，给你几个金币吧，元宵节，不容易 2011-02-17 16:09:28
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We think the product originally structure like 3a , he C=N duplet bond is in the link . The product X- unit crystal diffraction (chart crystal data) actually demonstrated that N(1)-C(1) key length is 1.363 Å ; But N(2)-C(1) key length is 1.288 Å , compares N(1)-C(1) key length. According to the literature, the C=N duplet bond's key length is 1.279 &N single bond key length is 1.339Aring; , but C Å. Therefore, N(1)-C(1) in fact is a single bond , ut N(2)-C(1) is a duplet bond, namely the C=N duplet bond is in outside the link, structure like 4a (chart). 用金山翻译的，看看行不行？行的话要小散BB哦~O(∩_∩)O~ |
2楼2011-02-17 15:53:05
huangpeipe(金币+20): 没错，只是你没看到单晶图，你要是看到就明白了，要结合图才能明白，谢谢 2011-02-19 09:30:35
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We thought the structure of the product as shown in Figure 3a, which had C= N bond in the ring. However，it can be seen from the single crystal X-ray of products (Figure crystal data) that N (1)-C (1) bond length is 1.363 Å, and the N (2)-C (1) 1.288 Å. According to the literature, C = N bond length is 1.279 Å of while C-N bond length is 1.339 Å. Therefore, N (1)-C (1) is actually a single bond, while N (2)-C (1) is a double bond, ie C = N double bond is in the ring. The structures were shown in Figure 4a. 你的中文里面没问题吧。你说文献中单键键长是1.339 Å，而你的数据中：N(1)-C(1)的键长为1.363 Å。由此说：N(1)-C(1)实际上是单键。没弄错吧？仔细核对一下 |
3楼2011-02-18 08:41:36
