The insertion of sulfur dioxide into palladium–methyl bonds: the synthesis and X-ray crystal structure of an unusual [(dppp)PdOS(Me)O]2[BAr′4]2 dimer

The migratory insertion of sulfur dioxide into the palladium(II)–methyl bond of [(dppp)Pd(Me)(OEt2)]BAr′4 [Ar′ = C6H3(CF3)2-3,5] to yield a unique dimeric eight-membered palladacycle was followed by NMR spectroscopy, and the product characterised by X-ray crystallography.