Synthesis, crystal structures and properties of coordination polymers from copper(II) adipate

Abstract

The synthesis, crystal structures and spectroscopy of [{Cu(μ2-adip)(benzim)2(H2O)}n] (1), [{Cu(μ2-adip)(4-pyme)2(H2O)}n] (2), [{Cu(μ3-adip)(nia)2}n·nH2O] (3), [{Cu(μ2-adip)(pydca)2}n] (4) and [{Cu(μ4-adip)(mna)}n·nH2O] (5) (adip = adipate2− anion, benzim = benzimidazole, 4-pyme = 4-pyridylmethanol, nia = nicotinamide, pydca = 3,4-pyridinedicarboxamide, mna = N-methylnicotinamide) are reported. The complexes under study were characterized by electronic, IR and EPR spectroscopy, and single-crystal X-ray structure analysis. The complexes form one-dimensional or two-dimensional brick-wall like coordination polymers. The coordination environments around the copper atoms of complexes 1–3 and 5 are distorted tetragonal pyramidal. The copper atom in complex 4 has tetragonal–bipyramidal coordination. Four different coordination modes of adipate ligands in the studied copper(II) complexes were observed. The coordination polymers of the complexes are connected through hydrogen bonds into 2-D or 3-D supramolecular frameworks.