N-(2-pyridinium)urea perrhenate

The N-(2-pyridinium)urea cation of the title compound, C6H8N3O+.ReO4-, is planar to within 0.085(9) Angstrom and adopts an s-cis-s-cis conformation with respect to the imino C-N bonds. The structure consists of columns of centrosymmetric dimeric plane-to-plane stacked cations and hydrogen-bonded anions. The distance between the anti-parallel carbonyl groups in the dimer is 3.16(5) Angstrom. An extensive network of hydrogen bonds stabilizes the ordering of the ions within the columns, which are held together by weaker hydrogen bonds and van der Waals interactions.