Thia­mine tetra­phenyl­borate monohydrate: a two-dimensional hydrogen-bonded network with (4,4)-topology.

The title compound, 3-[(4-amino-2-methyl­pyrimidin-5-yl)­meth­yl]-5-(2-hydroxy­eth­yl)-4-methyl­thia­zolium tetra­phenyl­borate monohydrate, C₁₂H₁₇N₄OS⁺·C₂₄H₂₀B⁻·H₂O, is a salt in which the thiamine cations are linked by hydrogen bonds into a two-dimensional network having (4,4)-topology. The stacked sheets form channels, which are occupied by the anions; the cations and anions are linked by C—H⋯π(arene) hydrogen bonds. [ABSTRACT FROM AUTHOR]