Crystal structure of (μ2-7-{[bis-(pyridin-2-ylmeth-yl)amino-1κ3 N, N', N'']meth-yl}-5-chloro-quinolin-8-olato-2κ N;1:2κ2 O)tri-chlorido-1κ Cl,2κ2 Cl-dizinc(II)

Abstract

The title compound, [Zn₂(C₂₂H₁₈ClN₄O)Cl₃], is a dinuclear zinc(II) complex with three chlorido ligands and one penta-dentate ligand containing quinolin-8-olato and bis-(pyridin-2-ylmeth-yl)amine groups. One of the two Zn^II atom adopts a tetra-hedral geometry and coordinates two chlorido ligands with chelate coord-ination of the N and O atoms of the quinolin-8-olato group in the ligand. The other Zn^II atom adopts a distorted trigonal-bipyramidal geometry, and coordinates one chlorido-O atom of the quinolin-8-olato group and three N atoms of the bis-(pyridin-2-ylmeth-yl)amine unit. In the crystal, two mol-ecules are associated through a pair of inter-molecular C-H⋯Cl hydrogen bonds, forming a dimer with an R ₂ ²(12) ring motif. Another inter-molecular C-H⋯Cl hydrogen bond forms a spiral C(8) chain running parallel to the [010] direction. The dimers are linked by these two inter-molecular C-H⋯Cl hydrogen bonds, generating a ribbon sheet structure in ac plane. Two other inter-molecular C-H⋯Cl hydrogen bonds form a C(7) chain along the c-axis direction and another C(7) chain generated by a d-glide plane. The mol-ecules are cross-linked through the four inter-molecular C-H⋯Cl hydrogen bonds to form a three-dimensional network.

Keywords: 8-quinolinol; C—H⋯Cl inter­actions; bis­(2-picol­yl)amine; crystal structure; dinuclear zinc(II) complex.

Figure 1

The mol­ecular structure of the title compound, with the atom labelling. Displacement ellipsoids are drawn at the 50% probability level. H atoms are represented by spheres of arbitrary radius.

Figure 2

The twofold symmetric dimeric structure of the title compound. The inter­molecular C18—H18⋯Cl4ⁱ hydrogen bonds are shown as dashed lines. H atoms not involved in these inter­actions have been omitted for clarity. [Symmetry code: (i) −x + 1, −y + 1, z.]

Figure 3

A portion of the crystal packing of the title compound showing the spiral C(8) chain formed via a 2₁ screw axis. The inter­molecular C26—H26⋯Cl3ⁱⁱⁱ hydrogen bonds are shown as dashed lines. H atoms not involved in the inter­actions were omitted for clarity. [Symmetry code: (iii) −x + , −y + 1, z − .]

Figure 4

A packing diagram of the title compound viewed along the a axis, showing the two-dimensional network structure. The inter­molecular C21—H21B⋯Cl4ⁱⁱ and C28—H28B⋯Cl3^iv hydrogen bonds are shown as dashed lines. H atoms not involved in the inter­actions have been omitted for clarity. [symmetry codes: (ii) x, y, z − 1; (iv) −x + , y − , z − .]