Sulfur extrusion and sulfur oxidation of 2,2′-dithiodibenzoic acid in combination with Cu(II) ion and in the absence of co-ligands: Structural, spectroscopic and thermogravimetric evidence

Abstract The interaction of Cu(BF 4 ) 2 with 2,2′-dithiodibenzoic acid (H 2 dtdb) in a CH 3 OH/dmf mixture leads to the formation of extended polymeric solids {[Cu(tdb)(dmf)]·(dmf)} n ( 1 ) and {[Cu 2 (tdb)(sdb)(dmf)(H 2 O)]·2(dmf)} n ( 2 ), where tdb 2−  = 2,2′-thiodibenzoate, sdb 2−  = 2,2′-sulfinatodibenzoate, dmf =  N , N ′-dimethylformamide. In all of the cases, reactions proceed with extrusion of one S atom and in 2 with additional S oxidation. Compound 1 represents 1D coordination polymer, while 2 exhibits 2D structure. Both compounds are built from similar [Cu 2 (μ 2 -RCOO) 4 ] metal clusters with the Cu(II) atom in the O 5 square-pyramidal geometry. All new solids were characterized by IR spectroscopy, thermogravimetric and single crystal X-ray diffraction analyses.