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

The two iodide salts, 4-[(benzyl-amino)-carbon-yl]-1-methyl-pyridinium iodide-iodine (2/1), C 14 H 15 N 2 O + ·I - ·0.5I 2 , I , and 4-[(benzyl-amino)-carbon-yl]-1-methyl-pyridinium triiodide, C 14 H 15 N 2 O + ·I 3 - , II , with different cation:iodine atoms ratios were studied. Salt I contains one cation, one iodide anion and half of the neutral I 2 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.