3,7-Bis(dimethylamino)phenothiazin-5-ium nitrate dihydrate
Savaridasson Jose KavithaDepartment of Chemistry, Bharathidasan University, Tiruchirappalli 24, IndiaM.M. RajDepartment of Chemistry, Bharathidasan University, Tiruchirappalli 24, IndiaKrishnaswamy PanchanatheswaranDepartment of Chemistry, Bharathidasan University, Tiruchirappalli 24, IndiaD.E. LynchSchool of Science and the Environment, Coventry University, Coventry CV1 5FB, England
2004en
ABI
Abstract
The reaction of 3,7-bis(dimethylamino)phenothiazin-5-ium chloride pentahydrate (methylene blue) with silver nitrate in a 1:2 molar ratio in water yielded the title compound, C16H18N3S+·NO3−·2H2O, as one of the products. The cationic dye molecules are planar and stacked in an antiparallel fashion, exhibiting π–π associations at a distance of 3.7040 (18) Å. The nitrate anion and the two water molecules are involved in a hydrogen-bonding network that also includes the phenothiazinium N atom.
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