N,N'-Diphenylguanidinium Hydrogenselenite Monohydrate

In the crystal structure of the title compound, C₁₃H₁₄N₃⁺.HSeO₃^-.H₂O, the phenyl rings lie syn to the unsubstituted N atom of the cation and the geometry of the guanidinium group is close to that expected for a central C(sp²) atom. The crystal packing is stabilized by an extensive network of hydrogen bonds. The anion is acceptor of the N-H guanidinium groups and the water molecule forms a four-membered hydrogen-bonded ring with the anion.

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