In the crystals of the title N-halomethylated quaternary ammonium salts, C19H23IN+·I−, (I) [systematic name: N-(4,4-diphenylbut-3-en-1-yl)-N-iodomethyl-N,N-dimethylammonium iodide], C20H25IN+·I−, (II) [systematic name: N-(5,5-diphenylpent-4-en-1-yl)-N-iodomethyl-N,N-dimethylammonium iodide], and C21H27IN+·I−, (III) [systematic name: N-(6,6-diphenylhex-5-en-1-yl)-N-iodomethyl-N,N-dimethylammonium iodide], there are short I...I− interactions of 3.564 (4), 3.506 (1) and 3.557 (1) Å for compounds (I), (II) and (III), respectively. Compound (I) crystallizes in the Sohncke group P21 as an `enantiopure' compound and is therefore a potential material for NLO properties. In the crystal of compound (I), molecules are linked by C—H...I− and C—H...π interactions which, together with the I...I− interactions, lead to the formation of ribbons along . In (II), there are only C—H...I− interactions which, together with the I...I− interactions, lead to the formation of helices along . In (III), apart from the I...I− interactions, there are no significant intermolecular interactions present.
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Document Type: Research Article
Departamento de Química, Universidad de Caldas, Manizales, Caldas, Colombia
Department of Chemistry, Illinois State University, Normal, Illinois, USA
Instituto de Química, UNAM, Circuito Exterior, Ciudad Universitaria, Delegación Coyoacán, C.P. 04510, México, D.F., Mexico
January 1, 2015