Syntheses, Crystal Structure, and Properties of Cu(II) and Zn(II) Complexes with 1, 4-phenylenediacetate and 2, 2′-bipyridine

Abstract

Two new complexes constructed by 1,4-phenylenediacetic acid (H 2 PDA) and 2,2 -bipyridine (2,2 -bpy), namely [Cu(PDA)(2,2 -bpy)]·5H 2 O (1) and [Zn 2 (PDA)( 2,2 -bpy) 2 Cl 2 ] (2), have been synthesized and characterized by single-crystal X-ray diffraction, elemental analysis, IR, and UV-Vis spectrum. Single-crystal X-ray diffraction reveals that they both crystallize in the triclinic space group of P-1. In complex 1, the Cu atom is hexa-coordinated and each asymmetric unit contains five uncoordinated water molecules that form a water cluster (H 2 O) 10 with their symmetric equivalent. Complex 2 is a simple dimer and the Zn atom is penta-coordinated. Both in complex 1 and 2 there are π−π stacking interactions. INTRODUCTIONRecently, much attention has been paid to the synthesis of coordination polymers due to their potential applications such as gas storage, selective catalysis, molecular separation, and magnetism. [1−8] As far as we know, selecting appropriate ligands is the most effective strategy in obtaining coordination polymers. As bridging ligands, carboxylates, especially multi-carboxylates, are of immense interest in the construction of polymeric coordination architectures not only because the fact that these polymers have a wide range of structural diversities and potential applications as porous materials and magnetic materials, but also because the multi-carboxylates are capable of functioning as hydrogen bond donors and/or

[μ-2,2′-(1,4-Phenylene)diacetato-κ2O1:O4]bis[aqua(2,2′-bipyridine-κ2N,N′)chloridocopper(II)] dihydrate

“…Data collection: SMART (Bruker, 2007); cell refinement: SAINT (Bruker, 2007); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: DIAMOND (Brandenburg, 1999); software used to prepare material for publication: SHELXTL (Sheldrick, 2008 candidates to coordinate to metal ions through nitrogen atoms or oxygen atoms for constructing a diversity of coordination architectures (Hu et al, 2009;Wu et al, 2010Wu et al, , 2011).…”