title: Insertion reactions of SO2 into Pd-OR bonds: preparation of alkyl sulfito complexes of palladium(II).
abstract: Mononuclear palladium-hydroxo complexes of the type [Pd(N-N)(C6F5)(OH)][(N-N = 2,2'-bipyridine (bipy), 4,4'-dimethyl-2,2'-bipyridine (Me2bipy), or N,N,N',N'-tetramethylethylenediamine (tmeda) react with SO2(1 atm) at room temperature in alcohol (methanol, ethanol, propanol or isopropanol) to yield alkyl sulfito palladium complexes [Pd(N-N)(C6F5)(SO2OR)](R = Me, Et, Pr or iPr). Similar alkyl sulfito complexes [Pd(N-N)(C6F5)(SO2OR)](N-N = bis(3,5-dimethylpyrazol-1-yl)methane); R = Me or Et) are obtained when [Pd(N-N)(C6F5)Cl] is treated with KOH in the corresponding alcohol ROH and SO2 is bubbled through the solution. The reaction of [Pd(bipy)(C6F5)(OH)] with SO2 in tetrahydrofuran gives [Pd(N-N)(C6F5)(SO2OH)]. The X-ray diffraction study of [Pd(tmeda)(C6F5)(SO2OPr)] has established the sulfur coordination of the propyl sulfito ligand.
authors.affiliation: Departamento de Química Inorgánica, Facultad de Quimica, Universidad de Murcia, 30071 Murcia, Spain. jruiz@um.es
authors.forename: José
authors.initials: J
authors.lastname: Ruiz
authors.forename: M Teresa
authors.initials: MT
authors.lastname: Martínez
authors.forename: Félix
authors.initials: F
authors.lastname: Florenciano
authors.forename: Venancio
authors.initials: V
authors.lastname: Rodríguez
authors.forename: Gregorio
authors.initials: G
authors.lastname: López
authors.forename: José
authors.initials: J
authors.lastname: Pérez
authors.forename: Penny A
authors.initials: PA
authors.lastname: Chaloner
authors.forename: Peter B
authors.initials: PB
authors.lastname: Hitchcock