Abstract
Two novel polymeric networks of cadmium(II), [Cd 2(ibn)(SeCN) 4] n ( 1) (ibn=1,2-diamino-2-methylpropane) and [Cd(pyz)(SeCN) 2] n ( 2) (pyz=pyrazine) have been synthesised and their molecular structures have been determined by X-ray crystallography. The polymer 1 consists of two 1D parallel chains of Cd(II), each having alternate tetrahedral (CdSe 4) and octahedral (CdN 6) Cd(II) centres bridged through selenocyanate, exhibiting symbiotic phenomena. The octahedral Cd(II) centre of one chain is linked with the tetrahedral Cd(II) centre of another chain through selenocyanate ligand resulting 1D ladder like structure. The complex 2 is a 2D network of octahedral Cd(II) (CdN 4Se 2) in which doubly selenocyanato bridged 1D coordination polymeric chains are linked through pyrazine ligand in a bc plane forming rectangular grid like structure.
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