Bis{2-[(E)-(5-tert-butyl-2-hydroxyphenyl)diazenyl]benzoato}dimethyltin(IV)

In the title diorganotin dicarboxylate, [Sn(CH3)2(C17H17N2O3)2], the tin(IV) atom is six-coordinated by four O atoms derived from asymmetrically coordinating carboxylate ligands, and two methyl-C atoms. The resulting C2O4 donor set defines a skew-trapezoidal bipyramid with the Sn—C bonds disposed over the weaker Sn—O bonds. Within each carboxylate ligand, the hydroxyl-H atom forms bifurcated O—H...(O,N) hydrogen bonds with carboxylate-O and azo-N atoms. The dihedral angles between the benzene rings in the two ligands are 10.44 (11) and 34.24 (11)°. In the crystal, centrosymmetric dimers are formed through pairs of Sn...O interactions [2.8802 (16) Å], and the dimers are linked into supramolecular layers in the ac plane by C—H...π interactions