Highly interpenetrated diamondoid nets of Zn(ii) and Cd(ii) coordination networks from mixed ligands

The syntheses, structures and thermal properties of three coordination networks [Zn(L1)(1,4-BDC)].H2O (L1 = N,N'-di(4-pyridyl)adipoamide; 1,4-H2BDC = 1,4-benzenedicarboxylic acid), 1, [Cd(L1)(1,4-BDC)].2H2O, 2, and [Zn2(L2)(1,4-BDC)2].2CH3OH (L2 = N,N'-di(4-pyridyl)dodecanamide), 3, are reported. Complexes 1 and 2 show the dia topology with the rare 8- and 9-fold interpenetrating modes, respectively, while 3 exhibits an interpenetrating 3-fold framework with the pcu Zn2(COO)2 dimer decorated topology. Complex 2 shows the maximum number of interpenetration presently known for interpenetrating diamondoid networks of coordination networks containing mixed spacer ligands.