Poly[[μ(2)-(1Z,N′E)-2-(1,3-benzothia­zol-2-ylsulfan­yl)-N′-(2-oxidobenzyl­idene-κ(2) O:O)acetohydrazidato-κ(2) O,N′](pyridine-κN)copper(II)]

In the title compound, [Cu(C(16)H(11)N(3)O(2)S(2))(C(5)H(5)N)](n), the Cu(II) atom displays a square-pyramidal CuN(2)O(3) coordination geometry with strong elongation in the vertex direction. The hydrazone mol­ecule is coordinated to the Cu(II) atom in a tridentate manner in the enolic form, creating five- and six-membered chelate metallarings. The pyridine mol­ecule completes the square-planar base of the copper coordination environment. The crystal structure displays zigzag polymeric Cu—O—Cu chains along [001]. Several weak π–π inter­actions between benzothia­zole rings were found in the same direction [centroid–centroid distances = 3.7484 (16), 3.7483 (16), 3.6731 (17) and 3.7649 (17) Å].