Anion-controlled dimerized rectangular, herringbone and tape building blocks by L-shaped diamide-substituted pyridinium salts via N–H⋯O and C–H⋯O hydrogen bonding
Anion-controlled dimerized rectangular, herringbone and tape building blocks by L-shaped diamide-substituted pyridinium salts via N–H⋯O and C–H⋯O hydrogen bonding