16949-85-2Relevant articles and documents
Ionic liquid in synthesis: A phase transfer reagent and a redox mediating medium
Lin, Guei-Wei,Lin, Yi-Chin,Lin, Su-Ching,Wen, Yuh-Sheng,Liu, Ling-Kang
, p. 281 - 287 (2013)
Ionic liquids (ILs) with chloride anion or bromide anion were attempted as a phase transfer reagent to depolymerizeMX2 (M = Pt, Pd; X = Br, Cl) in chloroform for reaction with 2,2′-bipyridine (= bpy) to give the (bpy)MX2 product. Supersonic irradiation of equiv-molar bpy, PdX 2, and IL in CHCl3 produced almost quantitative precipitate of (bpy)PdX2 in a short time at ambient temperature, where IL is either [BEIm]Br or [BMIm]Br. That is, ILs and sono-techniques assisted greatly on the synthesis of (bpy)PdX2. For preparation of (bpy)PtX2, nonetheless, free bpy always remained inmixture even after a long time of supersonic treatment. The system of equiv-molar bpy, PtBr 2, and IL in CHCl3, produced yellow (bpy)PtBr2 and orange (bpy)PtBr4, both being characterized with 1HNMR and 195Pt NMR in d6-Me2SO as well as with single crystal X-ray diffraction. Overall for PtX2 reactions with halide anions in highly polar environments attributable to ILs, the redox pathway becomes important in that Pt(II) transforms to Pt(IV) to yield (bpy)PtBr 2 and (bpy)PtBr4.
