分析测试学报2013，Vol.32Issue(1)：51-56,6.DOI:10.3969/j.issn.1004-4957.2013.01.007
季戊四醇双缩醛水解反应过程的1H NMR在线研究
On-line Tracking Investigation on the Hydrolysis Process of Pentaerythritol Diacetals with 1H NMR
摘要
Abstract
The hydrolysis process of pentaerythritol diacetals, including influence of reaction rate under different reaction conditions and different substituted groups on the aromatic ring of the reaction substrates, was studied with 1H NMR spectra. With pentaerythritol diacetals as the starting materials , their hydrolysis process was detected in the NMR tube under acidic conditions. The experimental results showed that the hydrolysis rate of pentaerythritol diacetals was increased with the rising of reaction temperature or the acidity of the reaction condition. The electron-donated groups on the aromatic ring of the reaction substrates could accelerate the hydrolysis; However, the electron-withdrawn groups could decelerate the reaction. The reaction rate sequence with the same electron-donated groups on the aromatic ring of the reaction substrates is: para-position > ortho-position > meta-po-sition, and the reaction rate sequence with the same electron-withdrawn groups on the aromatic ring of the reaction substrates is: meta-position > para-position > ortho-position. Therefore, a new method for on-line tracking of the hydrolysis of pentaerythritol diacetals was established. This method has the advantages of speediness and repeatability. The results could provide a theoretical reference for the hydrolysis of pentaerythritol diacetals.关键词
季戊四醇双缩醛/核磁共振/在线跟踪/水解速率Key words
pentaerythritol diacetals/1 H NMR/ on-line tracking/ hydrolysis rate分类
数理科学引用本文复制引用
张国君,杨扬,孙小强,李正义,周蓓蓓,殷乐..季戊四醇双缩醛水解反应过程的1H NMR在线研究[J].分析测试学报,2013,32(1):51-56,6.基金项目
国家自然科学基金资助项目(20872051) （20872051）
江苏省研究生科技创新基金资助项目 （）
