The spectroscopic study of hydrogen bonding in some 3,3'-derivatives of 2,2'-bipyridyl.
The spectroscopic study of hydrogen bonding in some 3,3'-derivatives of 2,2'-bipyridyl.
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2,2-联吡啶部分3,3-衍生物氢键的光谱研究。
DOI：
10.1016/j.saa.2004.01.025
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
W. Schilf
中科院分区：
文献类型：
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作者：
W. Schilf
用多核NMR、IR和X射线衍射方法研究了4个2，2 ′-联吡啶的3，3 ′-衍生物。在所有情况下，环外含氮取代基与吡啶型环氮原子之间均存在较弱的分子内氢键，而吡啶型环氮原子的化学位移不能提供有关氢键强度的有用信息。通过环外氨基和乙酰胺基的氮化学位移、固态氘同位素效应以及氯仿溶液和固态的红外光谱测量，证实了分子内氢键的存在。不对称3-氨基-3 ′-甲氨基和3，3 ′-二乙酰胺衍生物的X-射线结构证实了根据光谱结果得出的结论。
Four 3,3′-derivatives of 2,2′-bipyridyl have been investigated by multinuclear NMR, IR and X-ray methods. In all cases the weak intramolecular hydrogen bonds between exocyclic nitrogen-containing substituent and pyridine-type ring nitrogen atom were found. In contrast to the previous results the nitrogen chemical shifts of pyridine ring atom do not provide valuable information about hydrogen bond strength. The presence of intramolecular hydrogen bonds were confirmed by nitrogen chemical shifts of exocyclic amino and acetamide groups, deuterium isotope effects in the solid state and IR measurements in both chloroform solution and the solid state. The X-ray structures obtained for asymmetric 3-amino-3′-methylamino and 3,3′-diacetamide derivatives confirmed conclusions made on the base of spectral results.
国际KEK-科斯莫
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