Poly[propane-1,3-diammonium [diaqua(μ4-4-benzene-1,2,4,5-tetracarboxylato)cobaltate(II)] hemihydrate]

✍ Scribed by Aghabozorg, Hossein ;Attar Gharamaleki, Jafar ;Motyeian, Elham ;Ghadermazi, Mohammad

• Publisher: International Union of Crystallography
• Year: 2007
• Tongue: English
• Weight: 1010 KB
• Volume: 63
• Category: Article
• ISSN: 1600-5368
• DOI: 10.1107/s1600536807050659

✦ Synopsis

The title polymeric compound, {(C~3~H~12~N~2~)[Co(C~10~H~2~O~8~)(H~2~O)~2~]·0.5H~2~O}~n~, was obtained by the reaction of cobalt(II) nitrate hexahydrate with the proton-transfer compound (pnH~2~)~2~(btc)·2H~2~O (pn = propane-1,3-diamine and btcH~4~ = benzene-1,2,4,5-tetracarboxylic acid) in aqueous solution. Each Co^2+^ ion is situated on a crystallographic twofold rotation axis and is coordinated in a distorted octahedral geometry by six O atoms [Co—O = 2.0650 (9)–2.1107 (8) Å] from two coordinated water molecules and four (btc)^4−^ ligands which also act as bridging ligands between Co^2+^ ions. In the crystal structure, a wide range of non-covalent interactions consisting of O—H...O, N—H...O and C—H...O hydrogen bonds, as well as ion pairing, van der Waals forces and C—H...π stacking between the propane-1,3-diammonium ions and the aromatic rings of benzene-1,2,4,5-tetracarboxylate ligands, connect the various fragments, forming a three-dimensional supramolecular structure. The crystal studied was an inversion twin.