C20H34Cl2CuN2O8S4 ,t riclinic, P1 (no. 2), a =7 .105(5) A, b =1 0.578(7) A, c =1 1.007(7) A, 0 =7 1.58(1)°, / =8 4.51(2)°, . =7 7.47(2)°, V =7 65.8 A 3 , Z =1 , Rgt(F) =0 .050, wRref(F 2 ) =0 .155, T =2 96 K. Source of material Th et itle complex was synthesized from am ixture of CuCl2 (0.120 g, 0. 9m mol), isonicotinic acid (0.111 g, 0. 9m mol) and DMSO (1.0 ml) sealed in ap yrex tube, heated to 100 °C for 68 hours, and then cooled to room temperature at 10 °C/h. The pH value of the solution before and after the reaction was 7a nd 5, respectively. Th es olid products were recovered by vacuum filtration and washed with DMSO. Pale green rod-like crystals were obtained as as ingle phase. The product was slightly unstable in air. The yield was about 48 %b ased on copper. EDS analysis confirmed the presence of Cu and Cl. Experimental details All the hydrogen atom sa ssociated with the isonicotinic acid and DMSO molecule sw er ep lace dg eometrically an dr efined as