forthcoming articles

In the title compound, the two heterocyclic systems are connected by a nitro­gen atom and an intra­molecular hydrogen bond N—H⋯N. The exocyclic C=N double bond shows an E configuration. The associated N_thia­zole—C_thia­zole=N angle of 129.58 (4) ° is very wide. The triazinane ring displays a flattened boat conformation. Mol­ecules are linked to inversion-symmetric dimers by a further N—H⋯N hydrogen bond.

The crystal structure of (H₃O)Pb₂Br₅ contains an extended two-periodic Pb—Br network extending parallel to the ab plane, with hydroxonium ions embedded between neighbouring layers. O⋯Br contacts suggest possible O—H⋯Br hydrogen bonding.

The title compound features a nearly planar thia­zolo[3,2-a]benzimidazole core and a twisted 4-(tri­fluoro­meth­yl)phenyl ring, which subtends a dihedral angle of 52.6 (2)° with the thia­zole ring. The crystal packing is governed by C—H⋯N hydrogen-bonded chains, C—F⋯π and π–π contacts, with Hirshfeld and energy-framework analyses showing substantial dispersion-driven consolidation.

The crystal structure for (R)-3-fluoro­pyrrolidine hydro­chloride, C₄H₉FN⁺·Cl⁻, is presented. It features an extended hydrogen-bonded arrangement linking the ammonium N—H groups with the chloride anions.

A new norbornene-N-hy­droxy­succinimide bifunctional linker was obtained via a two-step synthesis. Crystals of the compound, which crystallizes in the monoclinic space group P2₁/n, were obtained by recrystallizion from hot water. The mol­ecule maintains an extended conformation, with the all-trans hexyl chain reducing steric hindrance between the norbornene and succinimidyl groups.

The crystal packing of the title compound is governed by O—H⋯N and N—H⋯O hydrogen bonds together with weak N—H⋯π inter­actions. Hirshfeld surface and DFT analyses complement the structural characterization.