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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。
In this paper, the photolysis mechanism of O ~ acyl-α-ketoxime R ~ 2C (O) ON = C (R ~ 1) C (O) R ~ 1 has been studied by infrared spectroscopy. Decomposition products generated by the kinetic equation fitting, obtained expression of kinetic rate constant. The results show that both the N-O bond cleavage and the Norrish reaction exist simultaneously in the photodecomposition reaction. Different R 1, R 2 substituents affect the ratio of the two cleavage modes.