Salts of 4-[(benzyl-amino)-carbon-yl]-1-methyl-pyridinium and iodide anions with different cation:iodine stoichiometric ratios

Abstract

The two iodide salts, 4-[(benzyl-amino)-carbon-yl]-1-methyl-pyridinium iodide-iodine (2/1), C₁₄H₁₅N₂O⁺·I^-·0.5I₂, I, and 4-[(benzyl-amino)-carbon-yl]-1-methyl-pyridinium triiodide, C₁₄H₁₅N₂O⁺·I₃ ^-, II, with different cation:iodine atoms ratios were studied. Salt I contains one cation, one iodide anion and half of the neutral I₂ mol-ecule in the asymmetric unit (cation:iodine atoms ratio is 1:2). Salt II contains two cations, one triiodide anion (I ₃ ^-) and two half triiodide anions (cation:iodine atoms ratio is 1:3). The NH group forms N-H⋯I hydrogen bonds with the I^- anion in the crystal of I or N-H⋯O hydrogen bonds in II where only triiodide anions are present.

Keywords: 4-[(benzyl­amino)­carbon­yl]-1-methyl­pyridinium; Hirshfeld analysis; crystal structure; mol­ecular structure.