Three-dimensional hydrogen-bonded framework structures in flunarizinium nicotinate and flunarizinediium bis­(4-toluene­sulfonate) dihydrate

Hydrogen bonding in flunarizinium nicotinate and flunarizinediium bis­(4-toluene­sulfonate) dihydrate forms different three-dimensional framework structures.

Different patterns of supra­molecular assembly in constitutionally similar 6-aryl­imidazo[2,1-b][1,3,4]thia­diazo­les

Four imidazo[2,1-b][1,3,4]thia­diazo­les display similar mol­ecular constitutions and exhibit a wide variety of supra­molecular structures. The mol­ecular skeletons are all nearly planar. Two of the structures exhibit C-H...N hydrogen bonding, forming ribbons in one and dimers in the other, while hydrogen bonding is absent in the remaining two structures.