Crystal structure of bis­{μ-(E)-2-[(2-oxido­phenyl­imino)­meth­yl]quinolin-8-olato-κ(4) O,N,N′,O′}bis­[di­butyl­tin(IV)]

Condensation of 8-hy­droxy­quinoline-2-carbaldehyde with 2-amino­phenol gave the (E)-2-[(2-hy­droxy­phenyl­imino)­meth­yl]quinolin-8-ol derivative that reacted with di-n-butyl­tin oxide with release of H(2)O to yield the chelate title complex, [Sn(2)(C(4)H(9))(4)(C(16)H(10)N(2)O(2))(2)]. The compound crystallizes in the triclinic space group P-1, with two independent centrosymmetric dimers in the unit cell. Each features a typical pincer-type structure where the dianionic ligand is tetra­dentate, coordinating to the central tin atom through both phenolate oxygen atoms, as well as through the quinoline and imine N atoms. Each metal atom adopts a distorted penta­gonal–bipyramidal SnC(2)N(2)O(3) coordination arising from the N,N′,O,O′-tetra­dentate deprotonated Schiff base, one bridging phenolate O atom of the neighbouring ligand and two butyl groups in the axial sites.