Ting Hu, Jin Yang, T. Mak
Jun 26, 2014
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0
Influential Citations
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Citations
Journal
CrystEngComm
Abstract
Six new silver ethynediide complexes containing trifluoroacetate and ligands derived from isomeric dicyanobenzenes, namely 2Ag2C2·10AgCF3CO2·3L1 (L1 = 1,2-dicyanobenzene) (1), 2Ag2C2·10AgCF3CO2·AgNO3·4L2 (L2 = 1,3-dicyanobenzene) (2), Ag2C2·2AgCF3CO2·2AgL3H·H2O (L3H2 = benzene-1,3-dicarboxylic acid) (3), Ag2C2·2AgCF3CO2·AgL3H·AgL4 (L4H = 3-cyanobenzenecarboxylic acid) (4), Ag2C2·4AgCF3CO2·2AgL5·4H2O (L5H = 4-cyanobenzenecarboxylic acid) (5) and 2Ag2C2·6AgCF3CO2·4AgL5·Ag2L6 (L6H2 = benzene-1,4-dicarboxylic acid) (6), have been synthesized under hydrothermal conditions and characterized using single crystal X-ray analysis. The Ln (n = 1–6) ligands incorporated into the silver ethynediide reaction system were generated in situ from hydrolysis of the o-, m- or p-isomers of dicyanobenzene. In the crystal structures of compounds 1–6, there are various types of silver(I) cages each enclosing a C22− dianion, which can be regarded as a multinuclear metal–ligand supramolecular synthon and symbolized as C2@Agn (n = 6–8). The silver cages are fused into infinite silver chains, which are connected by dicyanobenzene derivatives to yield two- and three-dimensional coordination networks in 1 and 2–6, respectively. The coordination capacity and structure-directing effect of the Ln ligands, as well as the temperature and pH value of the reaction mixture on the crystal structure of the resulting products, were also investigated.