Solvolysis of 9-(a-Bromoarylidene)anthrones aqueous EtOH1r is misleading since "TFE-EtOH" should be reserved for reactions in binary mixtures of the two alcohols.(34) The method of Raber, Harris, and co-workers1' utilizes a statistical analysis of the slope, the intercept, and their uncertainties. Hence, it appears superior in certain cases to the more convenient "two-points" method.However, there is an arbitrary criterion which accompanies the statistical analysis. In our opinion, a parallel arbitrary criterion together with a quantitative use of the log (/( , /^ ) values of -5 and 1.8 will make the two treatments equivalent. (35) Vogel, A. I. "Practical Organic Chemistry", 3rd ed.

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Chemical ionisation mass spectra of disulphide and dithiol both show ( M + H)*+ peaks. Analysis of the solutions from experiments in which the pro-ionophoric dithiol was 'switched-on' demonstrated the presence of the disulphide as the major volatile product along with traces of unchanged dithiol.