Crystal structure of N-butyl-2,3-bis-(di-cyclo-hexyl-amino)-cyclo-propeniminium chloride benzene monosolvate.

N-Butyl-2,3-bis-(di-cyclo-hexyl-amino)-cyclo-propenimine (1) crystallizes from benzene and hexa-nes in the presence of HCl as a mono-benzene solvate of the hydro-chloride salt, [1H]Cl·C(6)H(6) or C(31)H(54)N(3) (+)·Cl(-)·C(6)H(6), in the P2(1)/n space group. The protonation of 1 results in the generation of an aromatic structure based upon the delocalization of the cyclo-propene double bond around the cyclo-propene ring, giving three inter-mediate C-C bond lengths of ∼1.41†à , and the delocalization of the imine-type C-N double bond, giving three inter-mediate C-N bond lengths of ∼1.32†à . Ion-ion and ion-benzene packing inter-actions are described and illustrated.