Androš Lidija, Planinić Pavica, Jurić Marijana
Ruder Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia.
Acta Crystallogr C. 2011 Sep;67(Pt 9):o337-40. doi: 10.1107/S0108270111028162. Epub 2011 Aug 5.
The asymmetric unit of the title compound, C(10)H(10)N(2)(2+)·2C(2)HO(4)(-), consists of one half of a 4,4'-bipyridinium cation, which has inversion symmetry, and a hydrogen oxalate anion, in which an intramolecular hydrogen bond exists. The cations and anions are connected by O-H···O, N-H···O and C-H···O hydrogen bonds, forming a two-dimensional network, whereas π-π stacking interactions involving the 4,4'-bipyridinium cations lead to the formation of a three-dimensional supramolecular structure. An unusual deca-atomic ring is formed between two hydrogen oxalate anions, which are linked side-to-side via O-H···O hydrogen-bonding interactions.
标题化合物C(10)H(10)N(2)(2+)·2C(2)HO(4)(-)的不对称单元由具有反演对称性的4,4'-联吡啶鎓阳离子的一半和存在分子内氢键的草酸氢根阴离子组成。阳离子和阴离子通过O-H···O、N-H···O和C-H···O氢键相连，形成二维网络，而涉及4,4'-联吡啶鎓阳离子的π-π堆积相互作用导致形成三维超分子结构。在两个草酸氢根阴离子之间形成了一个不寻常的十原子环，它们通过O-H···O氢键相互作用并排相连。
