Trans-Bis(Acetonitrile-Kappa N)Bis( 1,1,1,5,5,5-Hexafluoropentane-2,4-Dionato-Kappa O-2,O ')-Nickel(Ii)
The title compound, [Ni(C5HF6O2)(2)(C2H3N)(2)], was obtained as an unintentional by-product in the reaction of Ni(hfac)(2) (hfac is hexafluoroacetylacetonate) with pyrazine N,N'-dioxide in acetonitrile. The molecule is centrosymmetric and the ligands are trans to one another, with the Ni-II atom on a position with 2/m symmetry. The CF3 groups are in a symmetry-imposed eclipsed conformation. The acetonitrile methyl group is involved in weak non-classical C-H center dot center dot center dot O intermolecular hydrogen bonding to the propanedionate O atoms. This forms a chain synthon parallel to the b axis. The chains are further arranged into sheets parallel to the bc plane.
Original Publication Title
Acta Crystallographica Section E-Structure Reports Online
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Southerland, H; Donovan, J; Twamley, B; and Manson, J, "Trans-Bis(Acetonitrile-Kappa N)Bis( 1,1,1,5,5,5-Hexafluoropentane-2,4-Dionato-Kappa O-2,O ')-Nickel(Ii)" (2007). Chemistry and Biochemistry Faculty Publications. 24.