【摘要】 本文报道十五种1,2-氧硼杂环戊烷衍生物及有关化合物的激光拉曼光谱。1,2-氧硼杂环戊烷的特征拉曼谱带在893～900cm^-1（环呼吸振动）和734～752cm^-1（环变形振动）范围内。根据各种化合物在815～838cm^-1范围内OBO变形振动谱带强度的比较,讨论了2,2′-烷撑二氧基-双-（1,2-氧硼杂环戊烷）类化合物形成网络状结构的可能性。化合物10的897和821cm^-1谱带强度比的对数ln(I₈₉₇/I₈₂₁)对绝对温度倒数（-1/T）作图得到一直线,表明化合物10以两种互变异构体的互变异构平衡状态存在: 10a10b根据谱带强度随温度的变化,认为在室温下10b比10a更稳定。根据热力学原理求得两种互变异构体之间的热焓差ΔH°=6.03×10⁸Jmol^-1。更多还原

【Abstract】 Raman spectra and structures of 2, 2’-alkylenedioxy-bis-1, 2-oxaborolanes and their related compounds have been reported in this paper. The Raman band of the "ring-breathing" vibration of 1, 2-oxaborolanyl group is in the region 893 to 900cm（-1）. The band in the region 734 to 752 cm^-1 is the ring deformation vibration of 1, 2-oxaborolanyl group. They are characteristic of 1, 2-oxaborolanyl group.A strong characteristic Raman band in the region 893 to 900cm^-1 for compounds 10 to 13 indicates that all these compounds have structure 10a （or 11a） form. The ban ds between 815 and 888 cm^-1 is strong for compounds 10 and 14, but weak for compounds 11 to 13. So we believe that compound 10 not only possesses form 10b, but also networklike form 10b. The absence of strong band between 815 and 838 cm^-1 for compounds 11 to 13 means all these compounds do not have a network-like structure.The variable temperature Raman spectra of compound 10 indicated that it may exist in two tautomeric forms, 10a and 10b. ln(I₈₉₇/I₈₂₁) and -1/T are listed in Table 2. The enthalpy difference between 10a and 10b is 6.03×10³ J mol^-1.更多还原