We report here the results of an ongoing project investigating the role of the solvent in a typical heterogenous catalyst hydrogenation. Limonene is used as the starting alkene, with acetic acid and methanol as primary solvents; Pd/C is the heterogenous catalyst. The four different combinations of hydrogen gas and solvent (H2H, H2D, D2D, D2H) were tested and the level of deuteration was compared using proton (1H) NMR, deuterium (2H) NMR and Mass Spectroscopy. It appears that there is some level of interaction between the catalyst and the solvent, and we intend to show whether the solvent can affect the level of deuteration in the product.

Does the solvent matter in hydrogenation?

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