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artículo con referato
"An unusual two-dimensional hydrogen-bonding network in bis(2,9-dimethyl-1,10-phenanthrolin-1-ium) peroxodisulfate dihydrate"
M.A. Harvey, S. Baggio, M.T. Garland and R. Baggio
Acta Cryst. C 64(9) (2008) o489-o492
The title compound, 2C14H13N2+·S2O82-·2H2O, is a protonated amine salt which is formed from two rather uncommon ionic species, namely a peroxodisulfate (pds2-) anion, which lies across a crystallographic inversion centre, and a 2,9-dimethyl-1,10-phenanthrolin-1-ium (Hdmph+) cation lying in a general position. Each pds2- anion binds to two water molecules through strong water-peroxo O–HO interactions, giving rise to an unprecedented planar network of hydrogen-bonded macrocycles which run parallel to (100). The atoms of the large R88(30) rings are provided by four water molecules bridging in fully extended form (H–O–H) and four pds2- anions alternately acting as long (O–S–O–O–S–O) and short (O–S–O) bridges. The Hdmph+ cations, in turn, bind to these units through hydrogen bonds involving their protonated N atoms. In addition, the crystal structure also contains ππ and aromatic-peroxo C–HO interactions.
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