4-benzyl pyridinium dihydrogenmonophosphate C6H5CH2C5H4NH+H2PO4− : Single-crystal structure and its conductivity in polycrystalline form

The salt 4-benzyl pyridinium dihydrogenmonophosphate is monoclinic P21/cP21/c with the following unit cell dimensions: a=5.7950(3)Å; b=9.3490(18)Å; c=23.537(5)Å; and β=97.328(11)β=97.328(11). Also, Dm=1.424Mgm−3, Dx=1.403Dx=1.403, μ=0.223mm−1, F(000)=560F(000)=560; T=293K; and R=0.0495R=0.0495 and Rw=0.0964Rw=0.0964 for 3733 independent reflections. The structure consists of infinite parallel two-dimensional planes built of H2PO4− anions and C6H5CH2C5H4NH+ cations mutually connected by strong O–H ⋯O and N–H ⋯O hydrogen bonding. There are no contacts other than the normal Van der Waals interactions between the layers. The conductivity relaxation parameters associated with some H+ conduction have been determined from an analysis of the M″/Mmax″ spectrum measured in a wide temperature range.