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在烯烃及其衍生物的均相岐化反应中,催化剂过渡金属价态的变化是尚未完全清楚的问题.近年来报导了应用ESR研究环烯的开环聚合及WCl_6固载在高分子载体上烯烃岐化反应中钨(Ⅵ)价态的变化.我们应用ESR研究了正链烯烃及其衍生物在岐化反应中钨价态的变化,得到了一些有启发性的ESR信号. ESR测量采用JES-FEIXG电子自旋共振仪在X波段工作.锰标作为磁场标尺和相对定量的内标.温度的控制与测量采用ES-DVTI变温附件.
In the homogeneous disproportionation reaction of olefins and their derivatives, the change of the valence state of the catalyst transition metal is not yet fully understood.In recent years, it has been reported that the ring-opening polymerization of cycloalkene and the immobilization of WCl_6 on the polymer carrier Variations of valence of tungsten (Ⅵ) in olefin disproportionation reaction.We used ESR to study the changes of valence of n-alkanes and their derivatives in the disproportionation reaction and obtained some enlightening ESR signals.ESR measurements were performed using JES-FEIXG electron spin resonance in the X-band work. Manganese standard magnetic field scale and the relative quantitative internal standard. Temperature control and measurement with ES-DVTI temperature accessories.