Run of the MIL: In contrast to MIL-53(Al), IM-19 (MIL-53 (Ga)) is extremely active and selective for the alkylation of aromatics. The reaction proceeds through the protonation of the aromatic substrate. CO adsorption and molecular modeling show that the bridging μ2-OH of IM-19 exhibits stronger Brønsted-type acidity than does MIL-53(Al).
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