Acta Crystallographica Section C

Crystal Structure Communications

Volume 65, Part 8 (August 2009)

metal-organic compounds

ga3128 scheme

Acta Cryst. (2009). C65, m321-m324 [ doi:10.1107/S0108270109028571 ]

Three-dimensional framework structures: isomorphous bis(2,6-diamino-3,5-dibromopyridinium) tetrabromidometallate(II) salts with Cd^II and Mn^II

R. H. Al-Far, S. F. Haddad and B. F. Ali

Abstract: In the structural motifs of two isomorphous triclinic salts, (C₅H₆Br₂N₃)₂[MBr₄] (M = Cd^II and Mn^II), each [MBr₄]^2- anion interacts with eight surrounding 2,6-diamino-3,5-dibromopyridinium cations through intermolecular C/N-HBr and BrBr interactions, leading to a three-dimensional framework structure. The cations show a minor degree of [pi] - [pi] stacking, adding extra stability to the three-dimensional architecture.

Formula: (C₅H₆Br₂N₃)₂[CdBr₄] and (C₅H₆Br₂N₃)₂[MnBr₄]


	Structure factor file (CIF format) (206.1 kbytes) [ doi:10.1107/S0108270109028571/ga3128Isup2.hkl ] Contains datablock I

	Structure factor file (CIF format) (203.5 kbytes) [ doi:10.1107/S0108270109028571/ga3128IIsup3.hkl ] Contains datablock II

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