- 作者: 張海舟,林瑞三,江志強,張芝敏,賴文偉,方靜雯,林聖賢
- 作者服務機構: Department of Chemistry, National Dong Hwa University, Shoufeng, Hualien 974, Taiwan, R.O.C.
- 中文摘要: The ability of the equatorial C-H bonds to form C-H---O hydrogen bonds was studied by measuring the high-pressure Raman spectra. We have investigated the effect of pressure versus C-H---O interactions in 1,3-dioxane/D2O mixtures. Dilution of 1,3-dioxane leads to a shift of the C-H signals to higher frequencies under ambient pressure. Based on the pressure-dependence of the Raman spectra, we have found that the equatorial C-H groups of 1,3-dioxane displays a remarkably different ability to serve as the weak hydrogen bond donors in comparison to the axial C-H of 1,3-dioxane. The new Raman spectral features observed under high pressure may arise from the combined effect of hydrogen-bond network changes, hydrogen bond-like C-H---O interactions formation, cluster size changes, etc. This finding may be important to diastereo- and enantioselective synthesis.
- 英文摘要: --
- 中文關鍵字: Pressure; Raman; Spectroscopy.
- 英文關鍵字: --