Crystal structure and Hirshfeld analysis of trans-bis­(5-fluoro­indoline-2,3-dione 3-oximato-κ(2) O (2),N (3))-trans-bis­(pyridine-κN)copper(II)

The reaction in methanol of Cu(II) acetate monohydrate with 5-fluoro­isatin 3-oxime deprotonated with KOH in a 1:2 molar ratio and recrystallization from pyridine yielded the title compound, [Cu(C(8)H(4)FN(2)O(2))(2)(C(5)H(5)N)(2)]. In the centrosymmetric complex, the anionic form of the isatin oxime acts as a κ(2) N,O donor, building five-membered metallarings. The Cu(II) cation is sixfold coordinated in a slightly distorted octa­hedral environment by two trans, equatorial, anionic isatin derivatives and two trans pyridine ligands in axial positions. The complexes are linked by hydrogen bonding into a three-dimensional network, which is also stabilized by π–π stacking inter­actions [centroid-to-centroid distance = 3.7352 (9) Å] and C—H⋯π contacts. The Hirshfeld surface analysis indicates that the major contributions for the crystal packing are H⋯H (31.80%), H⋯C (24.30%), H⋯O (15.20%) and H⋯F (10.80%). This work is the second report in the literature of a crystal structure of a coordination compound with isatin 3-oxime ligands (coordination chemistry).