2026-05-05T22:01:11Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/602262025-02-20T12:23:16Zcom_10324_28542com_10324_952com_10324_894col_10324_28543

Multifaceted role of silver salts as ligand scavengers and different behavior of nickel and palladium complexes: beyond halide abstraction Pérez Ortega, Ignacio Albéniz Jiménez, Ana Carmen Chemistry The reaction of [NiArBr(PPh3)2] with AgBF4 brings about the abstraction of both the halide and phosphine from the nickel center by silver. When the reaction is carried out in CH2Cl2/toluene a mixture of the cat- ionic aquo derivatives [NiAr(H2O)(PPh3)2]BF4 (2) and [NiAr(H2O)2(PPh3)]BF4 (3) is formed, along with AgBr and [Ag(PPh3)n]BF4. When the same reaction is carried out in acetone as the solvent, it leads to the com- pletely different complex [NiAr(κ2-O, O–MeC(O)CH2C(OH)Me2)(PPh3)] (5), bearing a chelating ligand formed by the aldol self-condensation of acetone. Phosphine abstraction by silver is less favorable for the analogous palladium(II) complexes and only occurs if a large excess of AgBF4 is used. Thus, silver salts can be safely used as halide scavengers for palladium derivatives. However, the generation of cationic Ni com- plexes from neutral precursors by halide extraction with a silver salt may produce naked species, different than those expected, and highly reactive in certain media 2023-07-11T11:52:15Z 2023-07-11T11:52:15Z 2023-07-11T11:52:15Z 2023 info:eu-repo/semantics/article Dalton Trans., 2023, 52, 1425–1432 1477-9226 https://uvadoc.uva.es/handle/10324/60226 10.1039/d2dt03948f 1425 5 1432 Dalton Transactions 52 1477-9234 eng https://pubs.rsc.org/en/content/articlelanding/2023/dt/d2dt03948f info:eu-repo/semantics/openAccess Royal Society of Chemistry