Alexander Pulis - Ambiphilic Frustrated Lewis Pair Exhibiting High Robustness and Reversible Water Activation: Towards the Metal Free Hydrogenation of Carbon Dioxide

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        Molecules   2015, 20, 11902-11914 

        É. Rochette, M. -A. Courtemanche, A. P. Pulis, W. Bi, F. -G.   Fontaine

        DOI: 10.3390/molecules200711902


        The synthesis and structural characterization of a   phenylene-bridged Frustrated Lewis Pair (FLP) having a   2,2,6,6‑tetramethylpiperidine (TMP) as the Lewis base and a   9-borabicyclo[3.3.1]nonane (BBN) as the Lewis acid is reported.   This FLP exhibits unique robustness towards the products of   carbon dioxide hydrogenation. The compound shows reversible   splitting of water, formic acid and methanol while no reaction is   observed in the presence of excess formaldehyde. The molecule is   incredibly robust, showing little sign of degradation after   heating at 80 °C in benzene with 10 equiv. of formic acid for 24   h. The robustness of the system could be exploited in the design   of metal-free catalysts for the hydrogenation of carbon   dioxide.

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