Water molecules assist the assembly of (E)-arylvinylpyridine hydrochlorides in a head-to-tail and face-to-face fashion by way of N–H⋯O hydrogen bonds in combination with cation–π interactions between the pyridinium and aromatic rings. Photolysis of the pyridinium salt hydrates provided synHT dimers in high yields.
                                    水分子通过 N-H⋯O 氢键以及
吡啶和芳香环之间的阳离子-π 相互作用,以头对尾和面对面的方式协助 (E)- 芳基
乙烯基吡啶盐酸盐的组装。光解
吡啶鎓盐
水合物可获得高产率的 synHT 二聚体。