O-酰基-α-酮肟光分解机理的研究

Study on the Mechanism of Photolysis of O-Acyl-α-Oximinoketone

本文用红外光谱法对O-酰基-α-酮肟R^2C(O)ON=C(R^1)C(O)R^1的光分解机理进行了研究,并通过对反应物消失和分解产物生成的动力学方程的拟合,求得了表现动力学速率常数。结果表明,N-O键断裂和Norrish反应在光分解反应中同时存在,不同的R^1、R^2取代基影响这两种断裂方式的比例。

The mechanism of photolysis of O-acyl-α-oximinoketones was studied by infrared spectroscopy, and kinetic equations of this photodecomposition were simulated, from which the apparant kinetic parameters were obtained. The results show that two kinds of cleavage, i.e., N--O bond cleavage and the Norrish type reaction, proceed simultaneously, and the fraction of N--O bond cleavage depends on the nature of substituents.