title: (2S,7S)-10-Ethyl-1,8,10,12-tetra-aza-tetra-cyclo-[8.3.1.1(8,12).0(2,7)]penta-decan-10-ium iodide.
abstract: The title chiral quaternary ammonium salt, C(13)H(25)N(4) (+)·I(-), was synthesized through the Menschutkin reaction between the cage aminal (2S,7S)-1,8,10,12-tetra-aza-tetra-cyclo-[8.3.1.1(8,12).0(2,7)]penta-decane and ethyl iodide. The quaternization occurred regioselectively on the nitrogen with major sp3 character. The crystal structure consists of anions and cations separated by normal distances. Ions are not linked through C-H⋯I hydrogen bonds.
authors.affiliation: Universidad Nacional de Colombia, Sede Bogotá, Facultad de Ciencias, Departamento de Química, Cra 30 No.45-03, Bogotá, Código Postal 111321,  Colombia.
authors.forename: Augusto
authors.initials: A
authors.lastname: Rivera
authors.forename: Héctor Jairo
authors.initials: HJ
authors.lastname: Osorio
authors.forename: John
authors.initials: J
authors.lastname: Sadat-Bernal
authors.forename: Václav
authors.initials: V
authors.lastname: Eigner
authors.forename: Michal
authors.initials: M
authors.lastname: Dušek