Energy Profiles and Reaction Surfaces
نویسنده
چکیده
by determining spectrometrically the extent of ionization for p-anisyldiphenylmethanol and correlated it with the known pKR+ value (-1.24)37 of p-anisyldiphenylmethyl cation. The ~ K R + values for the monocations and also the values corresponding to the second neutralization of the dications were determined at 25 "C in 50% acetonitrile by means of the UV spectrophotometric method described in a previous paper.38 Cyclic Voltammetry. The measurements were done with the method and apparatus described in the previous paper.% Sample solutions were 1 mM in cation and 0.1 M in tetrabutylammonium perchlorate as a supporting electrolyte. Scan rate was 0.1 V/s. All the cations exhibited the irreversible cathodic peak at the potential given in Table V. Immediately after each measurement, ferrocene (0.2 mM) was added as an internal standard,39 and the peak potential was corrected with reference to this standard.
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تاریخ انتشار 2001