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By applying complexes\u2005<jats:bold>3<\/jats:bold> with KHBEt<jats:sub>3<\/jats:sub> as additive, various aromatic and aliphatic esters were hydrogenated successfully at mild temperatures and low catalyst loadings, highlighting the efficiency of the novel catalytic system. The versatility of the developed catalytic system was further demonstrated by the hydrogenation of other substrate classes like ketones, nitriles, N\u2010heteroarenes and alkenes. 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