1,3-Bis[4-(dimethyl-amino)benz-yl]-4,5,6,7-tetra-hydro-1H-1, 3-diazepan-2-ium chloride

The title N-heterocyclic carbene derivative, C23H33N4 +· Cl-, has been synthesized and characterized by elemental analysis, 1H and 13C NMR, IR spectroscopy and a single-crystal X-ray diffraction study. Ions of the title compound are linked by three C - H?Cl inter-actions. The seven-membered 1,3-diazepane ring has a form inter-mediate between twist-chair and twist-boat.