Solvent-bridged frameworks of hydrogen bonds in crystals of 9-aminoacridinium halides

Abstract

Crystal structures of eight salts of 9-aminoacridine – chloride monohydrate (1), bromide monohydrate (2), iodide monohydrate (3), chloride methanolate (4), bromide methanolate (5), iodide methanolate (6), fluoride dihydrate (7) and chloride dihydrate (8) – have been studied. The ions and solvent molecules in the crystal structures of 1–8 interact via N–H⋯X, O–H⋯X and C–H⋯X hydrogen bonds (where X = O, F, Cl, Br or I), producing different types of supramolecular synthons consisting of amine groups of 9-aminoacridinium cations, halide anions and solvent molecules. The hybrid dihalide–dihydrate clusters of [X₂(H₂O)₂]²⁻ are observed in compounds 1, 2, 3 and 7. The dichloride–tetrahydrate cluster of [Cl₂(H₂O)₄]²⁻ and (H₂O)₄ water cluster are present in the crystals of 8.