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In the title compound, [Sn(C20H19N2O3)Cl3], the SnIV ion is surrounded by a tridentate monoanionic Schiff base and by three meridional chloride ions in a six-coordinated distorted octa­hedral geometry. The Sn—Cl bond [2.366 (2) Å] trans to nitro­gen is shorter than the others [2.438 (2) and 2.414 (2) Å]. The N—Sn—N angle [76.19 (11)°] is smaller than the O—Sn—N angle [87.89 (10)°] in the Schiff base ligand. No classical inter­molecular hydrogen-bonding inter­actions are observed. The crystal packing exhibits π–π stacking inter­actions, with a distance of 3.595 (2) Å between the centroids of the phenolate ring and the benzene ring of the quinoline group of inversion-related mol­ecules.
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