Rates and Equilibria of the Methoxide Attachment to 2,6-Di-tert-butyl-4-arylthiopyrylium Cations. Can Ion Pair Formation Be Rate Determining in Anion-Cation Combination Reactions?

Article abstract of DOI:10.1021/ja00272a041

The complete set of kinetic and equilibrium constants for the methoxide attachment to a series of 2,6-di-tert-butyl-arylthiopyrylium cations (aryl= X-C6H4 with X= p-NO2, m-Cl, p-Cl, H, p-Me, p-OMe, p-NMe2) has been obtained in MeOH at 25 deg C.The reactio