Anion-controlled structural motifs in cadmium coordination polymers: Formation of linear chain versus triple-stranded ladder

Abstract

Three novel coordination polymers [CdL(NCS)2(DMSO)2]n (1), {[Cd3L3(OAc)4(NCS)2] (DMSO)2]}n (2) and [CdL(µ-SeCN)2]n (3) have been synthesized by using exoditopic N-donor Schiff base ligand 1,4-bis(4-pyridyl)-2,3-diaza-1,3-butadiene (L) in the presence of different cadmium salts. The results show that anion has an important role in the formation of different structural motif. X-ray structural analysis shows that in these cases 1D linear chain, 1D triple-stranded ladder and 2D structural motifs have been formed for compound 1, 2 and 3, respectively. Our results showed that solvent type affect morphology of compound 1.