Synthesis and crystal structure of catena-poly[[tetra-μ-acetato-copper(II)]-μ-6-eth-oxy- N 2, N 4-bis-[2-(pyridin-2-yl)eth-yl]-1,3,5-triazine-2,4-di-amine]

Abstract

The title compound, [Cu₂(C₁₉H₂₃N₇O)(C₂H₃O₂)₄] _n , was obtained via reaction of copper(II) acetate with the coordinating ligand, 6-eth-oxy-N ²,N ⁴-bis-[2-(pyridin-2-yl)eth-yl]-1,3,5-triazine-2,4-di-amine. The crystallized product adopts the monoclinic P2₁/c space group. The metal core exhibits a paddle-wheel structure typical for dicopper tetra-acetate units, with triazine and pyridyl nitro-gen atoms from different ligands coordinating to the two axial positions of the paddle wheel in an asymmetric manner. This forms a coordination polymer with the segments of the polymer created by the c-glide of the P2₁/c setting of the space group. The resulting chains running along the c-axis direction are held together by intra-molecular N-H⋯O hydrogen bonding. These chains are further packed by dispersion forces, producing an extended three-dimensional structure.

Keywords: acetate; crystal structure; dinuclear copper; intra­molecular hydrogen bonding; triazine.