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https://irlib.pccu.edu.tw/handle/987654321/20535
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| 題名: | The Observation of the C-H center dot center dot center dot O(sp3) Hydrogen Bond in Trisialic Acid Lactone and Its Implications for Cooperative Lactonization |
| 作者: | Yu, YP (Yu, Yi-Ping)
Chen, CS (Chen, Chien-Sheng)
Lin, BC (Lin, Bo-Chao)
Gervay-Hague, J (Gervay-Hague, Jacquelyn)
Fang, JM (Fang, Jim-Min)
Hsu, CP (Hsu, Chao-Ping)
Wu, SH (Wu, Shih-Hsiung) |
| 貢獻者: | 食營系 |
| 關鍵詞: | Sialic acids
Lactones
Hydrogen bonds
Ab initio calculations
NMR spectroscopy |
| 日期: | 2009 |
| 上傳時間: | 2011-11-30 14:33:04 (UTC+8) |
| 摘要: | The C-H center dot center dot center dot O(sp3) hydrogen bond in trisialic acid lactones has been examined by using long-range COSY (LRCOSY) and ab initio calculations. From an analysis of the LRCOSY spectra, (3)J correlations of (B)H(ax)(9)/(A)H(8) and (C)H(ax)(9)/(B)H(8) confirmed the existence of hydrogen-bond connections of (x+1)C(9)-(x+1)H(ax)(9)center dot center dot center dot(x)O(8). The theoretical bond energy of the hydrogen bond was estimated to be 1.0 or 1.6 kcal/mol by using two models. The acid-catalyzed cooperative lactonization of oligosialic acids can be understood in terms of the additional C-H center dot center dot center dot O(sp3) stabilization in the lactone product. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009) |
| 顯示於類別: | [保健營養學系 ] 期刊論文
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