Supramolecular network via hydrogen bonding and π-π Stacking in 4,4′-bipyridin-1-ium perchlorate dihydrate

The crystal structure of 4,4′-bipyridin-1-ium perchlorate dihydrate, [C₁₀H₉N₂](ClO₄) • 2H ₂O, is determined by room temperature X-ray diffraction. The compound crystallizes in the triclinic space group P-1 with a = 8.122(3) Å, b = 9.726(3) Å, c = 17.648(6) Å, α = 78.181(4)°, β = 82.797(5)°, γ = 67.439(4)°, Z = 2, V = 1258.4(7) ų. In the compound, monoprotonated 4,4′-bipyridin-1-ium cations are self-assembled into supramolecular chains along the a-axis through N-H•••N hydrogen bonds in a head-to-tail fashion. The chains are stacked via π-π stacking interactions to create two-dimensional sheets. The interlayer space is occupied by the hydrogen-bonded water chains that are linked to the organic sheets via C-H•••O interactions and the perchlorate anions that are linked to the water chains and the organic sheets via O-H•••O and C-H•••O hydrogen bonds, respectively, thus generating a three-dimensional supramolecular architecture. Supramolecular Network via Hydrogen Bonding and π-π Stacking in 4,4′-Bipyridin-1-ium perchlorate dihydrate Jian-Yong Zhang, Ai-Ling Cheng and En-Qing Gao*Monoprotonated 4,4′-bipyridin-1-ium cations are self-assembled into supramolecular chains along the a-axis through N-H•••N hydrogen bonds, and these chains are stacked via π-π stacking and hydrogen bond interactions involving water molecules and perchlorate anions. [Figure not available: see fulltext.]