作业帮化学专业英语翻译,内容如下：本文以间位取代苯甲醛和自制季膦盐为原料,通过Witting反应,合成了7种不同取代基的 p-XC6H4CH=CHC6H4X-p,其结构均经核磁确定,并测定了其相应的紫外吸收光谱.定量研
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化学专业英语翻译,内容如下：本文以间位取代苯甲醛和自制季膦盐为原料,通过Witting反应,合成了7种不同取代基的 p-XC6H4CH=CHC6H4X-p,其结构均经核磁确定,并测定了其相应的紫外吸收光谱.定量研
化学专业英语翻译,内容如下：
本文以间位取代苯甲醛和自制季膦盐为原料,通过Witting反应,合成了7种不同取代基的 p-XC6H4CH=CHC6H4X-p,其结构均经核磁确定,并测定了其相应的紫外吸收光谱.定量研究了单取代变化对 p-XC6H4CH=CHC6H4X-p的紫外吸收光谱的影响.并结合其他研究者的有关实验数据,进一步探讨了双取代基变化 p-XC6H4CH=CHC6H4X-p的紫外光谱规律.结果表明,激发态取代基参数适应于该体系的紫外光谱研究.
关键词： p-XC6H4CH=CHC6H4X-p；取代基效应；紫外吸收；核磁谱图
化学专业英语翻译,内容如下：本文以间位取代苯甲醛和自制季膦盐为原料,通过Witting反应,合成了7种不同取代基的 p-XC6H4CH=CHC6H4X-p,其结构均经核磁确定,并测定了其相应的紫外吸收光谱.定量研
In this paper, m-substituted benzaldehydes and home of Phosphonium as raw material by Witting reaction, synthesis of the 7 different substituents p-XC6H4CH = CHC6H4X-p, and their structures were determined by nuclear magnetic resonance, and measured the corresponding UV absorption spectrum. Quantitative changes in the single substituted p-XC6H4CH = CHC6H4X-p of the UV absorption spectra. Combined with the experimental data of other researchers to further explore the changes in the double substituted p-XC6H4CH = CHC6H4X-p of the ultraviolet spectrum law. The results show that the substituent parameters of the excited state of the system adapted to the UV spectra.