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Mercury(II) thiolate complexes of two flexible benzimidazole‐based ligands

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The structure of catena‐poly[[{bis[4‐(trimethylammonio)benzenethiolate‐κS]mercury(II)}‐μ‐1,1′‐(ethane‐1,2‐diyl)bis(1H‐benzimidazole)‐κ2 N 3:N 3′] bis(hexafluoridophosphate) 0.25‐hydrate], {[Hg(C16H14N4)(C9H13NS)2](PF6)2ยท0.25H2O} n , contains a one‐dimensional zigzag chain. The HgII cation is coordinated by two S atoms of two 4‐(trimethylammonio)benzenethiolate (Tab) ligands and by two N atoms from two different 1,1′‐(ethane‐1,2‐diyl)bis(1H‐benzimidazole) ligands, forming a distorted seesaw‐shaped coordination geometry. The F atoms of the hexafluoridophosphate anion interact with the H atoms of the Tab ligand, generating a two‐dimensional network. Furthermore, this layer is connected to neighbouring layers via H...π interactions, thereby forming a three‐dimensional hydrogen‐bonded structure. In catena‐poly[[{[4‐(trimethylammonio)benzenethiolate‐κS]mercury(II)}bis[μ‐4‐(trimethylammonio)benzenethiolate‐κ2 S:S]{[4‐(trimethylammonio)benzenethiolate‐κS]mercury(II)}‐μ‐1,1′‐(hexane‐1,6‐diyl)bis(1H‐benzimidazole)‐κ2 N 3:N 3′] tetrakis(hexafluoridophosphate)], {[Hg2(C20H22N4)(C9H13NS)4](PF6)4} n , each HgII cation is coordinated by two S atoms of two Tab ligands and one N atom of the 1,1′‐(hexane‐1,6‐diyl)bis(1H‐benzimidazole) (hbbm) ligand, forming a distorted T‐shaped coordination geometry, while longer secondary Hg...S bonds join two such units across a centre of inversion to give the tetravalent cation. Adjacent {[Hg(Tab)2]2(μ‐hbbm)}4+ cations are linked through the centrosymmetric hbbm ligands to afford a one‐dimensional chain extending along the b axis. Several F atoms interact with the H atoms of the Tab and hbbm ligands, while the S atom interacts with an aromatic H atom of a different Tab ligand, to afford a complex intra‐ and intermolecular hydrogen‐bonding arrangement in a three‐dimensional structure.
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Document Type: Research Article

Affiliations: Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China

Publication date: July 15, 2011

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