Crystal structure of catena-poly[[[bis-(3-oxo-1,3-di-phenyl-prop-1-enolato-κ2 O, O')zinc(II)]-μ2-tris-[4-(pyridin-3-yl)phen-yl]amine-κ2 N: N'] tetra-hydro-furan monosolvate]

Abstract

The reaction of bis-(3-oxo-1,3-di-phenyl-prop-1-enolato-κ² O,O')zinc(II), [Zn(dbm)₂], with tris-[4-(pyridin-3-yl)phen-yl]amine (T3PyA) in tetra-hydro-furan (THF) afforded the title crystalline coordination polymer, {[Zn(C₁₅H₁₁O₂)₂(C₃₃H₂₄N₄)]·C₄H₈O} _n . The asymmetric unit contains two independent halves of Zn(dbm)₂, one T3PyA and one THF. Each Zn^II atom is located on an inversion centre and adopts an elongated octa-hedral coordination geometry, ligated by four O atoms of two dbm ligands in equatorial positions and by two N atoms of pyridine moieties from two different bridging T3PyA ligands in axial positions. The crystal packing shows a one-dimensional polymer chain in which the two pyridyl groups of the T3PyA ligand bridge two independent Zn atoms of Zn(dbm)₂. In the crystal, the coordination polymer chains are linked via C-H⋯π inter-actions into a sheet structure parallel to (010). The sheets are cross-linked via further C-H⋯π inter-actions into a three-dimensional network. The solvate THF mol-ecule shows disorder over two sets of atomic sites having occupancies of 0.631 (7) and 0.369 (7).

Keywords: C—H⋯π inter­actions; coordination polymer; crystal structure; tri­aryl­amine; β-diketonato zinc(II).