The structure of methanesulfonate salt of 3-(N-methyl)pyridinium boronic acid, [3-(N-Me)PyB(OH)2]CH3SO3, was determined by X-ray crystallography. The boronic acid salt existed in crystals as a monomeric form with a pair of strong O-H…O-S hydrogen bonds, and was characterized as: P21/c, a = 8.9460(18), b = 8.8380(18), c = 13.850(3)Å, β = 105.28(3)°, Z = 4, V = 1056.3(4)Å3.
