Rhodium is chosen as a catalyst for several reasons: - High Activity: Rhodium catalysts exhibit high catalytic activity, making them suitable for processes requiring high turnover numbers. - Selectivity: They offer excellent selectivity, which is critical for producing desired products without forming significant amounts of by-products. - Versatility: Rhodium can catalyze a diverse range of reactions, including hydrogenation, hydroformylation, C-H activation, and carbon-carbon coupling.