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Measures of regioselectivity quantified by values of β for C4H8O ring-opening with CH3OH as a function of (a) CH3OH concentration (0.005–1 M C4H8O, [CH3OH]/[CH3CN] = 0.2–100, CH3CN solvent, 308 K), and (b) C4H8O concentration at 0.025 M (triangles), 6 M (circles), or 24.7 M CH3OH (squares) (CH3CN, 308 K) over hydrophilic (solid) and hydrophilic (hollow) Al- (black) and Zr-BEA (blue). All measurements were made under C4H8O*-covered active sites.
