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Bis(4,4′-bipyridinium) bis(8-hydroxy­quinoline-5-sulfonate) bi­pyridine pentahydrate

✍ Scribed by Baskar Raj, Savarimuthu ;Muthiah, Packianathan Thomas ;Bocelli, Gabriele ;Cantoni, Andrea


Publisher
International Union of Crystallography
Year
2003
Tongue
English
Weight
278 KB
Volume
59
Category
Article
ISSN
1600-5368

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✦ Synopsis


Á2C 9 H 6 SO 4 À ÁC 10 H 8 N 2 Á5H 2 O, the asymmetric unit contains two 8-hydroxyquinoline-5sulfonate (HQS) anions, two 4,4 H -bipyridinium ions, a neutral 4,4 H -bipyridine molecule and ®ve water molecules. The sulfonic acid group is deprotonated. Interestingly, in both the HQS anions, the OÐH bond is oriented away from the quinoline-N atom, since the water molecule competes in hydrogen bonding with the quinolinol-O atom. The neutral 4,4 H -bipyridine and one of the protonated 4,4 H -bipyridine moieties are bridged by two water molecules, resulting in a `U'-shaped hydrogen-bonded molecular arrangement. Many stacking interactions were observed between: (i) the pyridine rings of bipyridine moieties; (ii) the pyridine rings of bipyridine and HQS moieties; (iii) the pyridine ring of bipyridine and the benzene ring of the HQS anion.


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