Acta Cryst. (2005). E61, m514-m516  [ doi:10.1107/S1600536805004113 ]

A one-dimensional Cl-bridged Pt^II/Pt^IV mixed-valence complex, catena-poly[[[bis(ethylenediamine)platinum(II)]--chloro-[bis(ethylenediamine)platinum(IV)]--chloro] tetrakis(tetrafluoroborate)]

N. Matsushita

Abstract: The title compound, {[Pt₂Cl₂(C₂H₈N₂)₄](BF₄)₄}_n or [Pt^II(C₂H₈N₂)₂][Pt^IVCl₂(C₂H₈N₂)₂](BF₄)₄, has a linear chain structure composed of square-planar [Pt(en)₂]²⁺ and elongated octahedral trans-[PtCl₂(en)₂]²⁺ cations (en is ethylenediamine) stacked alternately, bridged by the Cl atoms, along the c axis. The Cl atom bridging the adjacent Pt atoms is disordered over two sites along the Cl-Pt^IV-ClPt^II chain, which lies on a twofold axis. The Pt^IV-Cl and Pt^IICl bond distances are 2.319  (3) and 3.052  (3)  Å, respectively. A structural parameter indicating the mixed-valence state of the Pt atom, expressed by = (Pt^IV-Cl)/(Pt^IICl), is 0.760.

Online 12 February 2005

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