A 2:1 cocrystal of the cis and trans isomers of bis[1,1,1,5,5,5-hexafluoropentane-2,4-dionato(1-)-kappa O-2,O ']bis(4-phenylpyridine N-oxide-kappa O)copper(II)


The title compound is a co-crystal of the cis and trans isomers, namely cis-bis[1,1,1,5,5,5-hexafluoropentane-2,4-dionato(1-)-kappa O-2,O']bis(4-phenylpyridine N-oxide-kappa O)copper(II)-trans-bis[1,1,1,5,5,5-hexafluoropentane-2,4-dionato(1-)-kappa O-2,O']bis( 4-phenylpyridine N-oxide-kappa O)copper(II) (2/1), [Cu(C5HF6O2)(2)(C11H9NO)(2)]. In both isomers, the coordination geometry of the Cu2+ atom is octahedral, exhibiting typical Jahn-Teller distortion. The metal atom of the trans isomer is located on an inversion centre. In the cis isomer, the phenyl ring in one 4-phenylpyridine N-oxide ligand is disordered over two orientations in a 1:1 ratio. In the crystal, weak intermolecular C-H center dot center dot center dot F and C-H center dot center dot center dot O contacts establish connections between the cis and trans isomers.



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Fernandes, JA; Ramos, AI; Braga, SS; Paz, FAA

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We are grateful to the Fundacao para a Ciencia e a Tecnologia (FCT, Portugal) for their general financial support, for specific funding toward the purchase of the single-crystal X-ray diffractometer, and for the post-doctoral research grant Nos. SFRH/BPD/63736/2009 (to JAF). We further acknowledge the FCT for additional funding under the R&D project PTDC/QUI/69302/2006.

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