We assembled a larger dataset by searching Reaxys for Heck reactions where the Pdligands resembled the one used in our QM-methodology. Of these 3,342 reactions, only 287 have α-selectivity, 67 are a mix of the two, while the rest have β-selectivity. Only 99 for the α-selective reactions were obtained under cationic reactions conditions (primarily bidendate Pd-ligands and an aryl-triflate, cf. Table ) generally thought necessary to achieve exclusive α-selectivity. Also, electron donating groups (EDGs) on the alkene are generally thought to give mixtures or α-selectivity depending on the reaction conditions. However, 43 % of reactions involving strongly EDGs have reported β-selectivity. This, combined with the relatively low percentage (1 %) of reported isomer mixtures, could suggest that only the major or desired regioisomer is reported in the literature in many cases.