A 2:1 cocrystal of the cis and trans isomers of bis[1,1,1,5,5,5- hexafluoropentane-2,4-dionato(1-)-κ2O,O′] bis(4-phenylpyridine N-oxide-κO)copper(II)

Abstract

The title compound is a co-crystal of the cis and trans isomers, namely cis-bis-[1,1,1,5,5, 5-hexa-fluoro-pentane-2,4-dionato( 1-)-κ2 O,O′]bis-(4-phenyl-pyridine N-oxide-κO)copper(II)-trans-bis-[1,1,1,5,5,5-hexa-fluoro-pentane-2, 4-dionato(1-)-κ2 O,O′]bis(4-phenyl-pyridine N-oxide-O)copper(II) (2/1), [Cu(C5HF6O2) 2(C11H9NO)2]. In both isomers, the coordination geometry of the Cu2+ atom is octa-hedral, 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-phenyl-pyridine N-oxide ligand is disordered over two orientations in a 1:1 ratio. In the crystal, weak inter-molecular C - H⋯F and C - H⋯O contacts establish connections between the cis and trans isomers.