The crystal structures and Hirshfeld surface analyses of two similar azo compounds are reported. In the first, the mol­ecules form layers parallel to the (010) plane through C—H⋯π and C—Cl⋯π inter­actions and van der Waals inter­actions between these layers consolidate the packing. In the other, the mol­ecules are connected by C—H⋯O and C—H⋯Cl hydrogen bonds, forming a three-dimensional network. C—Cl⋯π inter­actions also contribute to the packing.

In the title compound, the crystal packing features C—H⋯Cl hydrogen bonds, which form R22(12) graph-set motifs.

The crystal structure of tris­[4-(3,4-di­meth­oxy­thio­phen-2-yl)phen­yl]amine (DMOT-TPA) was determined by X-ray diffraction. The central nitro­gen atom is non-pyramidal, with the three para-phenyl­ene rings in a propeller arrangement. The thio­phene rings are twisted by ca. 25–29° relative to the phenyl­ene rings, forming a distorted π-conjugated framework. In the crystal, C—H⋯π inter­actions link mol­ecules into two-dimensional sheets and a three-dimensional network.

The crystal structure of the title compound N-hy­droxy-4-{2-[(2-hy­droxy­eth­yl)(phen­yl)amino]-2-oxoeth­yl}benzamide monohydrate (HPOB·H2O) is reported.

In the title compound, the central zinc(II) ion coordinated by four 5-phenyl­imidazole ligands, with two nitrate anions providing charge balance·In the crystal, the nitrate ions occupy the voids formed by the [Zn(C9H8N2)4]2+ cations and function as counter-ions. The nitrate oxygen atoms participate in weak N—H⋯O hydrogen-bonding inter­actions.

The isotypic strontium analogue of the mineral henmilite, Sr2Cu(OH)4[B(OH)4]2, displays a quasi two-dimensional spin system with CuII ions.

The crystal structure of a new complex between the theophylline ligand and palladium has been elucidated.

The crystal structures of a solvated and an unsolvated di­thio­carbazate imine derivatives are compared and contrasted.

The title asymmetric biazolpyridine crystallizes in the triclinic space group P1 with two independent mol­ecules in the asymmetric unit. Structural and Hirshfeld surface analysis revealed key non-covalent inter­actions such as C—H⋯N/C/O and π–π stacking, which consolidate the crystal structure.

In the crystal, C—H⋯O hydrogen bonds link the mol­ecular pairs to form dimers with an R22(16) ring motif. Additionally, ribbons are formed along the [101] direction by C—H⋯π inter­actions. van der Waals inter­actions between the ribbons contribute to the cohesion of the mol­ecular packing.

In the title RuII complex, a meridionally bound 4,4′,4′′-tris­(meth­oxy­carbon­yl)terpyridine and a di­meth­oxy­phenyl­phosphine ligand define a distorted trans-RuN3PCl2 octa­hedral coordination environment, and water mol­ecules of crystallization bridge pairs of complex mol­ecules into discrete hydrogen-bonded dimers.

The title compound [Fe(C21H13N3S)(CO)(PMe3)2] exhibits a square-pyramidal geometry, distinct from the trigonal–bipyramidal geometry in [Fe(C21H13N3S)(CO)3], due to the σ-donating properties of the two tri­methyl­phosphane ligands. An increase in π-back-donation from the electron-rich iron center to the pyridazine moiety was also confirmed.

The title compounds exhibit a consistent pattern of inter­molecular O—H⋯O hydrogen bonds, forming a C(7) zigzag chain propagating in the [010] direction in each case.

The crystal structure of racemic calcium 5-methyl­tetra­hydro­folate trihydrate has been solved and refined using synchrotron X-ray powder diffraction data, and optimized using density functional theory techniques.

The title compounds have different local symmetries but a consistent supra­molecular motif of zigzag supra­molecular ribbons propagating along the [100] direction linked by N—H⋯N and N—H⋯O hydrogen bonds. Various weak inter­actions consolidate both structures.

The title compound crystallizes with two independent mol­ecules in the asymmetric unit, which are connected into chains by N—H⋯O hydrogen bonds.

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The extended structure of the title salt features a network of N—H⋯O, O—H⋯O, and C—H⋯O hydrogen bonds, which generate infinite layers.

A paper-based virtual X-ray diffraction experiment, which is based on the right-angle condition for constructive inter­ference, allows the implications of Bragg's law to be studies in a simple way.

The structure of a tris­[hexa­kis­(imidazole)­cobalt(II)] bis­(benzene-1,3,5-tri­carboxyl­ate) compound was determined by single-crystal X-ray diffraction.

The (modified) triazine ring in the title compound is planar. The packing involves classical and ‘weak' hydrogen bonds, together with π contacts to the triazine ring.

In the complex [Ag(2AB)2]NO3·(2AB)2 (2AB: 2-amino­benzoxazole), the central silver atom is coordinated monodentately by two 2AB ligands forming a linear geometry. The extended structure features N—H⋯N, N—H⋯π and π–π inter­actions.

Single-crystal X-ray diffraction studies were performed on two new forms of tinidazole: triclinic and hemihydrate, and their structures were compared to that of the known monoclinic form.

Treatment of a tetra­(aceto­nitrile)­copper(I) precursor with excess xylyl isocyanide forms the title tetra­(isocyanide)copper(I) complex, which was characterized structurally and spectroscopically.

The newly synthesized compound (l-HisH2)CuI3·H2O (where l-HisH2 = l-histidinium) possesses a rare one-dimensional A2CuX3-type structure built from chiral left-handed helical chains of corner-sharing [CuI4] tetra­hedra. Crystal structure and Hirshfeld surface analyses reveal that hydrogen bonding and π⋯I inter­actions play a vital role in mediating the inter­actions between the organic and inorganic components of this compound. Distortion analysis using τ4, τ4', and Baur indices shows that this compound exhibits the lowest [CuI4] tetra­hedral distortion among reported analogues.