Acta Crystallographica Section E: Crystallographic Communications (Apr 2018)

Crystal structure and Hirshfeld analysis of trans-bis(5-fluoroindoline-2,3-dione 3-oximato-κ2O2,N3)-trans-bis(pyridine-κN)copper(II)

  • Ana Paula Lopes de Melo,
  • Leandro Bresolin,
  • Bianca Barreto Martins,
  • Vanessa Carratu Gervini,
  • Adriano Bof de Oliveira

DOI
https://doi.org/10.1107/S2056989018003365
Journal volume & issue
Vol. 74, no. 4
pp. 428 – 432

Abstract

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The reaction in methanol of CuII 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(C8H4FN2O2)2(C5H5N)2]. In the centrosymmetric complex, the anionic form of the isatin oxime acts as a κ2N,O donor, building five-membered metallarings. The CuII 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).

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