The zip file contains the main folders (1) 'analytics' and (2) 'kinetics' (1) ‘analytics’ Subfolders contain raw and evaluated analytical data (NMR, IR, HRMS) used to characterize the products isolated from the reactions of trialkylsiloxy dienes with benzhydrylium ions. (2) 'kinetics' Subfolders LY-xxx contain *.txt files with absorbance vs. time data [raw data] *.exp files used for the kobs determination [evaluated data] *.pdf files with results of the kobs determination [evaluated data]. Folder and file names LY-xxx refer to individual experiments and are identical to those in this Supporting Information.eng