Acta Cryst. (2004). E60, m319-m321  [ doi:10.1107/S160053680400337X ]

Bis(piperidinium) trans-dichlorobis(3,5-dinitrobenzoato)zincate(II)

E. B. Miminoshvili, A. N. Sobolev, K. E. Miminoshvili and T. N. Sakvarelidze

Abstract: Complexes of 3d transition metal chlorides with dinitrobenzoic acids (DNBH) and secondary amines have been synthesized in order to model processes of chemisorption of organic salts by metal surfaces. A series of compounds of composition (AmH)₂[MCl₂(DNB)₂] (where M = Zn^II, Cu^II; AmH⁺ is the cation of piperidine PipH⁺ = C₅H₁₀NH₂⁺ or diethylamine DaH⁺ = C₄H₁₀NH₂⁺) have been prepared, the structure of the piperidinium salt of the Zn/3,5-DNB complex anion being authenticated by X-ray crystallography. In the title compound, (C₅H₁₂N)₂[ZnCl₂(C₇H₃N₂O₆)₂], the Zn atom is four-coordinated. The DNB ligand behaves as a monodentate ligand via an O atom of the carboxylate group, the other carboxylate O atom being hydrogen bonded to one of the ammonium H atoms. The other ammonium H atom of the two cations links to the coordinated chlorides, one within the complex and the other across an inversion center, so forming a dimer.

Online 20 February 2004

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