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本文报道了对C_6H_6+AlCl_3+CHCl_3,C_6H_6+AlCl_3+CCl_4,C_6H_6+AlCl_3+CDCl_3,C_6H_6+AlCl_3+CBr_4等体系的ESR研究结果。发现上述四种反应体系具有共同的自由基中间体。借助于计算机解谱得到它的超精细偶合常数分别是:6个完金等性的氢(I=1/2),a_H=2.10G;2个完全等性的铝(I=2/5),a_(Al)=0.45G。推测其可能的结构为:Cl_3Al←C_6H_6→AlCl_3。本文还对C_6H_6+AlCl_3+CHCl_3和C_6H_6+AlCl_3+CCl_4两体系的相对电导率随反应时间的变化和反应温度随反应时间的变化作了测定。发现电导率曲线和反应温度曲线变化是同步的。当反应停止后,电导率维持一定值。根据实验结果,提出该反应可能遵从自由基机理。
In this paper, ESR results of C_6H_6 + AlCl_3 + CHCl_3, C_6H_6 + AlCl_3 + CCl_4, C_6H_6 + AlCl_3 + CDC_3, C_6H_6 + AlCl_3 + CBr_4 systems were reported. The above four reaction systems were found to have a common free-radical intermediate. The hyperfine coupling constants obtained by computerized spectroscopy are as follows: six gold equivalents (I = 1/2), a_H = 2.10G; two completely equal aluminum (I = 2/5) , a_ (Al) = 0.45G. It is speculated that its possible structure: Cl_3Al ← C_6H_6 → AlCl_3. In this paper, the relative conductivity of C_6H_6 + AlCl_3 + CHCl_3 and C_6H_6 + AlCl_3 + CCl_4 two systems with the reaction time and the reaction temperature was determined with the change of reaction time. Found that the conductivity curve and the reaction temperature curve is synchronized. When the reaction is stopped, the conductivity is maintained at a constant value. According to the experimental results, it is suggested that the reaction may follow the free radical mechanism.