Formation of a one-dimensional water chain containing two linking patterns of planar water tetramers

Abstract

The self-assembly of the title dinuclear complex, namely (mu-p-phenylenediamine-N,N,N',N'-tetraacetato)bis[aqua(1,10-phenanthroline)nickel(II)] dodecahydrate, [Ni(2)(C(14)H(12)N(2)O(8))(C(12)H(8)N(2))(2)(H(2)O)(2)].12H(2)O, through intricate noncovalent interactions results in a two-dimensional sheet-like structure. The dimer lies about an inversion centre at the centre of the p-phenylenediamine ring. Uncoordinated water molecules form one-dimensional chains in which cyclic water tetramers act as two types of building blocks. The water molecules play a significant role in the stabilization of the three-dimensional supramolecular framework. Intramolecular ;aryl-metal chelate ring' pi-pi interactions are also observed.

2,2′,2′′,2′′′-(1,4-Phenylenedinitrilo)tetraacetic acid dihydrate

“…For the crystal structures of metal complexes of the title compound, see: Gonzá lez et al (1997); ; ; Zhang et al (2007). For synthetic details, see: Zhang et al (2007). (2) 164Symmetry codes:…”

“…In recent research, the 2,2′,2′′,2′′′-(1,4-phenylenebis(azanetriyl))tetraacetic acid ligand (H 4 dbta) formed metal complexes. (González et al, 1997;Zhang, et al, 2007). We expected to synthesize zinc complexes by the reaction of H 4 dbta with zinc chloride in water.…”

“…All reagents were of analytical grade and used without further purification. 2,2′,2′′,2′′′-(1,4-Phenylenebis(azanetriyl))tetraacetic acid(H 4 dbta) was synthesized by a previously reported method (Zhang et al, 2007). H 4 dbta (0.17 g,0.5 mmol) and ZnCl 2 (0.136 g, 1.0 mmol) were mixed in 15 mL of water.…”