Intra-molecular 1,5-S⋯N σ-hole inter-action in (E)-N'-(pyridin-4-yl-methyl-idene)thio-phene-2-carbohydrazide

The title compound, C11H9N3OS, (I), crystallizes in the monoclinic space group P21/n. The mol-ecular conformation is nearly planar and features an intra-molecular chalcogen bond between the thio-phene S and the imine N atoms. Within the crystal, the strongest inter-actions between mol-ecules are the N-H⋯O hydrogen bonds, which organize them into inversion dimers. The dimers are linked through short C-H⋯N contacts and are stacked into layers propagating in the (001) plane. The crystal structure features π-π stacking between the pyridine aromatic ring and the azomethine double bond. The calculated energies of pairwise inter-molecular inter-actions within the stacks are considerably larger than those found for the inter-actions between the layers.

Copper(i) complexes of functionalized sulfur-containing ligands: structural and theoretical insights into chalcogen bonding

Four new copper(i) thiocyanate complexes were studied using geometrical parameters and the lump–hole approach for justification of the strength and nature of chalcogen bonding.

Highly selective detection of Hg2+ and MeHgI by di-pyridin-2-yl-[4-(2-pyridin-4-yl-vinyl)-phenyl]-amine and its zinc coordination polymer

Di-pyridin-2-yl-[4-(2-pyridin-4-yl-vinyl)-phenyl]-amine and its zinc coordination polymer are used to detect Hg²⁺ and MeHgI with high selectivity.