Self-Catenated Coordination Polymers Involving Bis-pyridyl-bis-amide

The synthesis, structures, and properties of five new coordination polymers containing bis-pyridyl-bis-amide and polycarboxylate ligands, {[Cd(1,2-bdc)(L-1)(H2O)]center dot H2O} [1,2H(2)bdc = benzene-1,2-dicarboxylic acid; L-1 = N,N'-di(3-pyridyl)-suberoamide] (1), {[Cd-2(1,3-bdc)(2)(L-1)(3)]center dot 8H(2)O} [1,3-H(2)bdc = benzene-1,3-dicarboxylic acid] (2), [Cd(1,4-bdc)(L-1(H2O)(2)] [1,4-H(2)bdc = benzene-1,4-dicarboxylic acid] (3), {[Cd-2(1,2,3-Hbtc)(2)(L-1)(3)] center dot 4H(2)O}(n) [1,2,3-H(3)btc = 1,2,3-benzene-tricarboxylic acid] (4), and [Cd(1,4-pda)(L-2)](n) [L-2 = N,N'-di(3-pyridyl)-adipoamide; 1,4-H(2)pda = 1,4-phenylenediacetic acid] (5), are reported, which have been characterized by single crystal X-ray diffraction. Complex 1 forms a looplike 1D chain, whereas 2 and 4 show 3D frameworks with a new self-catenated net with point symbol (6(5)-8). Complex 3 displays a 2D layer with the sql topology and 5 displays a rare 8T17 self-catenated net. The dimensionality and structural types of 1-3 can be adjusted by varying the ligand isomerism of the dicarboxylate ligands.