Novel one-dimensional polymeric chlorocadmate sulfonium salts obtained from sulfonium ylides: Synthesis and structural characterization

Protonated sulfonium ylide chlorocadmate compounds of type [ ( Me ) 2 SCH 2 C ( O ) C 6 H 4 R ] + [ CdCl 3 ] - (R = H(1); p-Br (2); p-Me (3); p-OMe (4); p-NO2 (5)) were prepared by the reaction of α-keto stabilized sulfonium ylides (Me)2SCHC(O)C6H4R with CdCl2⋅H2O in 1:2 M ratios using methanol as solvent. Characterization of the compounds by IR, 1H- and 13C NMR spectroscopy indicated the absence of coordination of the protonated sulfonium ylide to the metal through either the carbon or oxygen atoms. The crystal structures of compounds 1 and 2 were both found to consist of organic cations, [ ( Me ) 2 SCH 2 C ( O ) C 6 H 4 R ] + (R = H(1) and p-Br (2)) and infinite one-dimensional chains of formula [ CdCl 3 ] n - In both structures each Cd atom is five-coordinate with square pyramidal coordination geometry.