2026-04-13T08:16:25Zhttps://recercat.cat/oai/request

oai:recercat.cat:10256/117262024-06-18T13:50:35Zcom_2072_452955com_2072_2054col_2072_453073

00925njm 22002777a 4500 dc Ferrer Vall-llosada, Íngrid author Rich Masallera, Jordi author Fontrodona, Xavier author Rodríguez Pizarro, Montserrat author Romero García, Isabel author info:eu-repo/date/embargoEnd/2026-01-01 info:eu-repo/date/embargoEnd/2026-01-01 2013-10-07 The synthesis of two Ru-dmso complexes containing the ligands 2-(3-pyrazolyl)pyridine (pypz-H), and pyrazole (pz-H), [RuIICl 2(pypz-H)(dmso)2], (2) and [RuIICl 2(pz-H)(dmso)3], (3), has been described. Both complexes have been fully characterized in solution through 1H-NMR and UV-Vis techniques and also in the solid state through monocrystal X-ray diffraction analysis. The redox properties of both complexes have also been studied by means of cyclic voltammetry. Exposure of 2 to visible light in acetonitrile produces a substitution of one dmso ligand by a solvent molecule generating a new complex, [RuIICl2(MeCN)(pypz-H)(dmso)] (4). Also, UV-visible spectroscopy points out that complex 2 presents a thermal and photochemical substitution of dmso ligands in aqueous solution. Finally, the reactivity of complexes 2 and 3 has been tested with regard to the hydration of nitriles using water as a single solvent, displaying good efficiency and selectivity for the corresponding amide derivatives. In general, better performance is achieved with complex 3. Reuse of these catalysts in water and glycerol has been explored for the first time in ruthenium-mediated nitrile hydration catalysis This research has been financed by MICINN of Spain (CTQ2010-21532-C02-01) http://hdl.handle.net/10256/11726 Ruteni -- Compostos Ruthenium compounds Catàlisi Catalysis Hidròlisi Hydrolysis Ru (II) complexes containing dmso and pyrazolyl ligands as catalysts for nitrile hydration in environmentally friendly media