catena-Poly[[[(pyridine-κN)copper(II)]-μ-3-{1-[(2-amino-eth-yl)imino]-eth-yl}-6-methyl-2-oxo-2H-pyran-4-olato-κN,N,O:O] perchlorate].

In the title compound, {[Cu(C(10)H(13)N(2)O(3))(C(5)H(5)N)]ClO(4)}(n), the Cu(II) atom has an N(3)O(2) coordination sphere. The complex contains two different ligands, viz. a pyridine mol-ecule and a Schiff base mol-ecule, resulting from the condensation of ethyl-enodiamine with dehydro-acetic acid. The Cu(II) atom exhibits a square-pyramidal geometry: three of the four donors of the pyramid base belong to the Schiff base ligand (an N atom from the amine group, a second N atom from the imine group and the O atom of the pyran-one residue) and the fourth donor is the pyridine N atom. The coordination around the metal ion is completed by a longer axial bond to the pyran-one O atom of an adjacent Schiff base, so forming a one-dimensional polymer. The complex has a +1 charge that is compensated by a perchlorate ion. The crystal packing, which can be described as alternating chains of cations and tetra-hedral perchlorate anions along the a axis, is stabilized by inter-molecular N-H⋯O, C-H⋯O and C-H⋯N hydrogen-bonding interactions.