DFT analysis, reaction kinetics and mechanism of esterification using pyridinium nitrate as a green catalyst
作者:Ivaylo Tankov、Rumyana Yankova
DOI:10.1016/j.molliq.2018.12.087
日期:2019.3
The ionic liquid pyridinium nitrate ([H–Pyr]+[NO3]−) was synthesized and characterized theoretically and experimentally. Different quantum chemical analyses such as molecular electrostatic potential surface, natural bond orbital and frontier molecular orbital analyses were used for investigation of the electronic properties and chemical reactivity of the title compound. It was found the existence of
合成了离子液体硝酸吡啶鎓([H–Pyr] + [NO 3 ] -),并在理论上和实验上进行了表征。不同的量子化学分析,例如分子静电势面,自然键轨道和前沿分子轨道分析,被用于研究标题化合物的电子性质和化学反应性。发现硝酸根阴离子和吡啶鎓阳离子之间存在相互作用,主要通过氢键O 7 ⋯H 11 N 1的形成来表达。为了研究[H-Pyr] +的催化特性,使用了用1-丁醇进行的乙酸酯化反应作为模型反应。[NO 3 ] -。详细讨论了各种工艺参数(催化剂浓度,初始丁醇与乙酸的摩尔比和反应温度)对乙酸转化率和反应速率常数的影响。使用伪均质动力学模型验证了获得的实验数据。另外,提供了一种由离子液体硝酸吡啶鎓催化的乙酸丁酯合成的合理反应机理。