research papers
Hydrogen bonding in flunarizinium nicotinate and flunarizinediium bis(4-toluenesulfonate) dihydrate forms different three-dimensional framework structures.
research papers
The reaction of (2RS,3SR)-2,3-dibromo-1,3-bis(4-fluorophenyl)propan-1-one with phenylhydrazine gave a pyrazole exhibiting some aromatic-type delocalization in the pyrazole ring and with molecules that are linked into simple chains by a single C-H(arene) hydrogen bond. The same reaction with 4-hydroxybenzohydrazide instead of phenylhydrazine gave a solvated oxadiazine, with the oxadiazine molecules linked by a combination of N-HN and C-HO hydrogen bonds to form complex sheets and with the solvent molecules attached at the outer faces by O-HO hydrogen bonds.
research papers
In four halogenated N,2-diarylacetamides, two are isostructural in the space group P, with molecules linked into chains of rings by a combination of N-HO and C-H(arene) hydrogen bonds. Molecules of the other two acetamides are linked into simple C(4) chains by N-HO hydrogen bonds, but significant C-H(arene) interactions are absent.
research papers
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-HN hydrogen bonding, forming ribbons in one and dimers in the other, while hydrogen bonding is absent in the remaining two structures.