Determination of Rate Constants for Formation and Decomposition of Color Products in the Fujiwara Reaction Using Benzotrichloride

概要

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The rate constants for the formation and the decomposition of color products in the Fujiwara reaction using benzotrichloride (α, α, α-trichlorotoluene) as the starting material were evaluated by means of simultaneous nonlinear least-squares fitting for the time course data of three compounds. The apparent rate constants for the formation of red and yellow compounds are 0.16 (s^<-1>) and 0.095 (s^<-1>), respectively, and those for the decomposition of these chromophores are 10.3 (s^<-1>) and 0.67 (s^<-1>), respectively. These results indicate that the red compound which is the main color compound in the Fujiwara reaction is very unstable and the yellow compound is rather stable. It was found that 40.3% of benzotrichloride is converted to the red compound, 23.9% to the yellow compound and 35.8% to other compounds.
社団法人日本薬学会の論文
1984-01-25