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

• Protonated sulfonium ylide chlorocadmate compounds are structurally characterized for the first time.
• Spectroscopy data demonstrates the absence of coordination of the protonated sulfonium ylide to the metal.
• The crystal structures show organic cations and infinite one-dimensional chains of chlorocadmate.

Protonated sulfonium ylide chlorocadmate compounds of type [(Me)2SCH2C(O)C6H4R]+[CdCl3]-[(Me)2SCH2C(O)C6H4R]+[CdCl3]-(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)2SCH2C(O)C6H4R]+[(Me)2SCH2C(O)C6H4R]+(R = H(1) and p-Br (2)) and infinite one-dimensional chains of formula [CdCl3]n- In both structures each Cd atom is five-coordinate with square pyramidal coordination geometry.