A new hydrated crystalline form of -[()-(4-hy-droxy-phen-yl)methyl-idene]-1-1,2,4-triazol-3-amine and its anti-fungal activity.

The synthesis, crystal structure, Hirshfeld analysis, and anti-fungal assessment of a new monohydrated Schiff base with a triazole moiety are reported. The structural study revealed the presence of three significant hydrogen bonds (N-H⋯N, O-H⋯N, and O-H⋯O), which contribute to the cohesion of the crystal. These bonds generate two-dimensional layers parallel to the plane, built on the basis of rings with the graph-set motifs (8) and (24).

Crystal structure and Hirshfeld surface analysis of a new benzimidazole compound, 3-{1-[(2-hy-droxyphen-yl)meth-yl]-1-1,3-benzo-diazol-2-yl}phenol.

The title compound, CHNO, is composed of two monosubstituted benzene rings and one benzimidazole unit. The benzimidazole moiety subtends dihedral angles of 46.16 (7) and 77.

A new crystal form and anti-microbial activity of ()-1-[3-(2-hy-droxy-benzyl-idene-amino)-phen-yl]ethanone.

The title Schiff base compound, CHNO, crystallizes in a new crystal form in the space group 222, which is different from the monoclinic 2/ space group reported previously [De (2009 ▸). , , 595-598]. An intra-molecular O-H⋯N hydrogen bond occurs between the hy-droxy and azomethine moieties.