research papers
The molecular components of a solvated 7H-pyrimido[4,5-b][1,4]diazepine derivative are linked by hydrogen bonds to form sheets containing four types of hydrogen-bonded ring.
research papers
Two independent - stacking interactions link the molecules of (E)-3-{4-[(7-chloroquinolin-4-yl)oxy]-3-methoxyphenyl}-1-(4-methylphenyl)prop-2-en-1-one, but hydrogen bonds are absent from the structure.
research papers
In a substituted pyrazolo[1,5-a][1,3,5]triazine, centrosymmetric dimers generated by C-HO hydrogen bonds are linked into chains by a - stacking interaction.