Two one-dimensional coordination polymers generated from a new benzimidazole bridging ligand and CdX2 (X = Br and I)

• Published in: Acta crystallographica. Section C, Crystal structure communications Crystal structure communications, 2013-05, Vol.69 (5), p.476-479
• Main Authors: Zhang, Yue-Feng, Ma, Jian-Ping, Liu, Qi-Kui, Dong, Yu-Bin
• Format: Article
• Language: English
• Subjects: Asymmetry; Bridging; Coordination polymers; Crystal structure; Crystallography; Hydrogen bonds; Ligands; Molecules; Polymers; Solvents; Three dimensional
• ISSN: 0108-2701; 1600-5759
• DOI: 10.1107/S0108270113006471

The novel asymmetric bridging ligand 1‐[(pyridin‐3‐yl)methyl]‐2‐[4‐(pyridin‐3‐yl)phenyl]‐1H‐benzimidazole (L) has been used to construct the coordination polymers catena‐poly[[[dibromidocadmium(II)]‐μ3‐1‐[(pyridin‐3‐yl)methyl]‐2‐[4‐(pyridin‐3‐yl)phenyl]‐1H‐benzimidazole] monohydrate], {[CdBr2(C24H18N4)]·H2O}n, (I), and catena‐poly[[diiodidocadmium(II)]‐μ3‐1‐[(pyridin‐3‐yl)methyl]‐2‐[4‐(pyridin‐3‐yl)phenyl]‐1H‐benzimidazole], [CdI2(C24H18N4)]n, (II). Compounds (I) and (II) are closely related one‐dimensional polymers based on 16‐ and 20‐membered macrocycles along the chains, but they are not isomorphous. The chains are crosslinked into a two‐dimensional network via hydrogen bonds and π–π interactions in (I), and into a three‐dimensional framework through π–π interactions in (II). One well‐ordered solvent water molecule per asymmetric unit is included in (I) and forms O...Br hydrogen bonds.