Reactions of 2,2′-Pyridyl with the cadmium(II) compounds: Synthesis, crystal structure, and luminescence properties of [Cd(Pic)(HO)] · HO.

The reactions of 2,2'-pyridyl, (2-Py)C(O)C(O)(2-Py), with the Cd(II) compounds under various conditions are studied. The medium and nature of the anions exert a decisive effect on the compositions and structures of the formed cadmium complexes. The reaction of cadmium diacetate with 2,2'-pyridyl in an aqueous-alcohol medium in air affords coordination compound [Cd(Рic)(HO)] · HO ( I) (Pic is picolinate ion, COCHN), and its crystal structure is determined. The crystals are monoclinic: space group P2/ c, a = 7.499(1), b = 15.676(1), с = 12.719(1) Å, β = 94.79(1)°, V = 1490.0(2) Å3, Z = 4, ρ = 1.502 g/cm. The molecular packing of compound I is a supramolecular 3D framework consisting of discrete complexes [Cd(Pic)(HO)] linked by hydrogen bonds O-H...O. The coordination sphere of Cd contains two O atoms and two N atoms of the ligand and two water molecules. The coordination polyhedron of Cd is a distorted octahedron. [ABSTRACT FROM AUTHOR]