The formation of a halogen-bonded zigzag mol­ecular network based upon 1,2-di­iodo­perchloro­benzene and the head-to-tail photoproduct rctt −1,3-bis­(pyridin-4-yl)-2,4-di­phenyl­cyclo­butane is reported. The co-crystal is sustained by IN halogen bonds where the photoproduct acts as a linear linker while the donor behaves as a bent two-connected node within the zigzag chain.

The formation of a co-crystal with a zigzag topology sustained by halogen bonds involving the photoproduct rtct-tetra­kis­(pyridin-4-yl)cyclo­butane acting as a two connecting node is reported.

In the title compound, two imidazolyl groups are separated by a zigzag –CH=N—N=CH– linkage. Each mol­ecule forms four N—HN hydrogen bonds with two neighbouring mol­ecules to constitute a one-dimensional ladder-like structure along the a axis.

In the title crystal, mol­ecules are linked by N—HO hydrogen bonds, forming ribbons parallel to (020) in zigzag C(7) chains along the a axis. These ribbons are connected via C—Hπ inter­actions, forming a three-dimensional network.

In the title compound, each Hg^II ion is coordinated by two pyridine N atoms from two symmetry-related unsymmetrical dipyridyl ligands and two chloride anions in a highly distorted tetra­hedral geometry. Each unsymmetrical dipyridyl ligand links two Hg^II ions into polymeric zigzag chains. In the crystal, the chains are linked into a three-dimensional supra­molecular network by inter­molecular N/C—HCl hydrogen bonds and weak C—Hπ inter­actions. Weak C—Clπ inter­actions and ClCl contacts between the network and the solvent chloro­form mol­ecules are also observed.

In the crystal, the 2-amino-5-{(1E)-1-[(carbamo­thioyl­amino)­imino]­eth­yl}-4-methyl-1,3-thia­zol-3-ium cations are linked by O—HCl, N—HCl, N—HO, N—HS and C—HS hydrogen bonds, forming a tri-periodic network.

The crystal structures of three mixed-valence copper cyanide polymers with similar polymeric CuCN networks are described, together with the results of electron spin resonance and thermogravimetric analyses.

This work focused on characterizing the structure from a stereochemical point of view, discussing the Pb^II character. The XRD data were collected at 200 K.

In the crystal, the mol­ecules are connected into dimers by C—HO hydrogen bonds with (8) ring motifs, forming zigzag ribbons along the b-axis direction.

The reaction of Hg^II with the bridging ligand bis­(pyridin-3-ylmeth­yl)sulfane afforded a one-dimensional zigzag chain polymeric structure, with the charge balanced by two coordinated chloride anions. C—HCl hydrogen bonds and Hg—Clπ inter­actions, together with C—Hπ hydrogen bonds, stabilize the crystal structure.