Acta Crystallographica Section C

Crystal Structure Communications

Volume 68, Part 12 (December 2012)

metal-organic compounds

fg3281 scheme

Acta Cryst. (2012). C68, m370-m376    [ doi:10.1107/S0108270112047452 ]

Low-dimensional compounds containing bioactive ligands. IV. Unusual ionic forms of 5-chloro­quinolin-8-ol

P. Vranec, I. Potocnák and P. Repovský

Abstract: Bis(5-chloro-8-hy­droxy­quinolinium) tetra­chloridopalladate(II), (C9H7ClNO)2[PdCl4], (I), catena-poly[dimethyl­ammonium [[di­chloridopalladate(II)]-[mu]-chlorido]], {(C2H8N)[PdCl3]}n, (II), ethyl­enediammonium bis­(5-chloro­quinolin-8-olate), C2H10N22+·2C9H5ClNO-, (III), and 5-chloro-8-hy­droxy­quinolinium chloride, C9H7ClNO+·Cl-, (IV), were synthesized with the aim of preparing biologically active complexes of PdII and NiII with 5-chloro­quinolin-8-ol (ClQ). Compounds (I) and (II) contain PdII atoms which are coordinated in a square-planar manner by four chloride ligands. In the structure of (I), there is an isolated [PdCl4]2- anion, while in the structure of (II) the anion consists of PdII atoms, lying on centres of inversion, bonded to a combination of two terminal and two bridging Cl- ligands, lying on twofold rotation axes, forming an infinite [-[mu]2-Cl-PdCl2-]n chain. The negative charges of these anions are balanced by two crystallographically independent protonated HClQ+ cations in (I) and by dimethyl­ammonium cations in (II), with the N atoms lying on twofold rotation axes. The structure of (III) consists of ClQ- anions, with the hy­droxy groups deprotonated, and centrosymmetric ethyl­ene­di­ammonium cations. On the other hand, the structure of (IV) consists of a protonated HClQ+ cation with the positive charge balanced by a chloride anion. All four structures are stabilized by systems of hydrogen bonds which occur between the anions and cations. [pi]-[pi] inter­actions were observed between the HClQ+ cations in the structures of (I) and (IV).

Formula: (C9H7ClNO)2[PdCl4], (C2H8N)[PdCl3], C2H10N22+·2C9H5ClNO- and C9H7ClNO+·Cl-

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Chemical Markup Language (CML) file
[ doi:10.1107/S0108270112047452/fg3281IIIsup6.cml ]
Supplementary material

cmldisplay filedownload file

Chemical Markup Language (CML) file
[ doi:10.1107/S0108270112047452/fg3281IVsup7.cml ]
Supplementary material


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