catena-Poly[[[pyridine­copper(II)]bis­[μ₃-4-(2-oxidobenzyl­ideneamino)­benzoato]] dimethyl­formamide disolvate], a polymer composed of dimeric dicopper building units

The title compound, {[Cu(C₁₄H₉NO₃)(C₅H₅N)]·C₃H₇NO}_n or {[Cu₂L₂(py)₂]·2DMF}_n [py is pyridine, L is 4-(salicylidene­amino)benzoate and DMF is dimethyl­formamide], is composed of dimeric dicopper [CuL(py)]₂ building units, which are inter­linked into a one-dimensional chain through the formation of Cu—O_COO bonds. The dimeric unit is centrosymmetric, containing two Cu^II atoms linked by bridging phenolate O atoms into a Cu₂O₂ plane with a chelating Cu—O bond length of 1.927 (2) Å and a bridging Cu—O bond length of 2.440 (2) Å. Inter­chain C—H...O and π–π stacking inter­actions are responsible for an extensive three-dimensional structure in which the resulting channels are filled by DMF solvent mol­ecules.