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(L-1)(1,4-BDC)]center dot H2O (L-1 = N, N'-di(4-pyridyl) adipoamide; 1,4-H2BDC = 1,4-benzenedicarboxylic acid), 1, [Cd(L-1)(1,4-BDC)]center dot 2H(2)O, 2, and [Zn-2(L-2)(1,4-BDC)(2)]center dot 2CH(3)OH (L-2 = 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 Zn-2(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.