Charge-assisted N(+)–H···(−)S hydrogen bonds in the crystal structure of selected diammonium thiophenolates

New salts of thiophenol with three flexible aliphatic diamines H2N(CH2)nNH2 (n = 2, 4 and 6) have been synthesized and characterized by elemental analyses, IR spectroscopy and X-ray crystallography in order to analyze their supramolecular architecture. Structural analyses indicate that in the crystals, proton transfer has occurred, with the –SH group giving (+)N–H···S(−) hydrogen bonding interaction. The structure of compound 1 exhibits a two-dimensional network and compounds 2–3 a three-dimensional supramolecular networks, and each of them is based on hydrogen bonds and CH···π interactions. The transfer of proton from the thiol to the diamines was confirmed by the solid-state FTIR spectra of 1–3.