Crystal structure of (R)-3-fluoro­pyrrolidine hydro­chloride

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.

Photo-induced synthesis and structure of (benzo[4,5]imidazo[2,1-b]thia­zol-2-yl)[4-(tri­fluoro­meth­yl)phen­yl]methanone

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.

Synthesis and structure of poly[hydroxonium [μ₄-bromido-tetra-μ₃-bromido-diplumbate(II)]]

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.

Nitrate salt of a hydro­carbazole oxime cation and a hydrated co-crystal of its chloride salt with cyclo­hexane-1,2,3-trione 1,3-dioxime

Reactions of cyclo­hexane-1,3-dione dioxime in the presence of nickel(II) salts yield a hydro­carbazole oxime cation, isolated as a nitrate salt and as a hydrated chloride co-crystal with cyclo­hexane-1,2,3-trione 1,3-dioxime. The two structures show different proton arrangements and hydrogen-bonding environments.