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In the binuclear copper(II) title complex, [Cu 2 (C 9 H 7 O 4 ) 4 (C 2 H 3 N) 2 ], an inversion centre is situtated at the mid-point of the Cu—Cu bond. The Cu II  atom together with its four coordinated O atoms are in a distorted planar square arrangement while the nitro­gen and the other Cu II  atom are located in apical positions. The whole mol­ecule looks like a paddle-wheel. In the crystal, chains are assembled along the  b  axis through C—H⋯O hydrogen bonds and slipped π–π inter­actions between the benzene rings of neighbouring mol­ecules [centroid–centroid distance = 3.6929 (3) Å and slippage = 0.641 (1) Å].

acta crystallographica. section e

Tetrakis[μ-2-(methoxycarbonyl)benzoato-κ2O1:O1′]bis[(acetonitrile-κN)copper(II)](Cu—Cu)