Acta Cryst. (2012). E68, m40  [ doi:10.1107/S1600536811052524 ]

Bis[₃-N'-oxidopyridine-2-carboximidamidato(2-)]bis[₂-N'-oxidopyridine-2-carboximidamidato(1-)]tetrapyridinetetranickel(II) dinitrate

X.-H. Deng and J.-W. Ran

Abstract: The title compound, [Ni₄(C₆H₅N₃O)₂(C₆H₆N₃O)₂(C₅H₅N)₄](NO₃)₂, is a tetranuclear nickel complex containing a single-decker cation, located on an inversion center. The two unique Ni^II cations are N,N',N'',O-chelated by carboximidamidate(2-) and carboximidamidate(1-) anions, forming a distorted four-coordinate planar structure, while the other two Ni^II atoms are N,N',O,O'-chelated by the same bridging ligands and two pyridine molecules, affording six-coordinated metals in an octahedral geometry. The cation is isostructural with the complex crystallized with perchlorate counter-ions in place of nitrate.

Online 10 December 2011

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