Six d10 metal complexes containing multidentate dicyanoisophoronetriazolyl derivative: Structures and luminescent properties

The ligand [(E)-2-(3-(4-(1H-1,2,4-triazole-1-yl)styry1)-5,5-dimethylcyclohex-2-enylidene)malononitrile] (L) reacts with Zn(II), Cd(11) and Hg(II) salts, six new complexes, namely HgL2Cl2 (1) HgL2Br2 (2) HgL(2)l(2) (3) ZnL2I2 (4) ZnL2(SCN)(2) (5) and [CdL2(mu(1,3)-SCN)(2)In (6) are presented along with an analysis of their structural features. The mercury(II) and zinc(II) ions in 1-5 are four-coordinated by two L and two haloid or thiocyanate ions to form a distorted tetrahedral geometry. In polymer 6, the adjacent Cd(II) ions show an octahedral coordination geometry, which is bridged by two mu(1,3)-SCN ions to form an infinite chain with two remaining positions of six-coordinated Cd(II) ion being occupied by two L. These structures are built up through the combination of coordination bonds, hydrogen bonding, and pi...pi stacking interactions to generate new supramolecular architectures. Luminescent properties and thermal stabilities of complex 1-6 are studied in the solid state. (C) 2014 Elsevier B.V. All rights reserved.