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■ Crystal Structures of N,N’-bis(5-Dodecyloxytropon-2-yl)piperazine and N,N’-bis(4-Butoxyphenyl)piperazine

Kanji Kubo,* Emi Yamamoto, Taisuke Matsumoto, Seiji Ujiie, and Akira Mori

*Department of Life Science and Technology, Faculty of Engineering, Hokkai-Gakuen Univiersity, Sapporo, Hokkaido 062-8605, Japan

Abstract

The crystal structures of N,N’-bis(5-dodecyloxytropon-2-yl)piperazine (1) and N,N’-bis(4-butoxyphenyl)piperazine (2) were analyzed by X-ray crystallography. The molecules of 1 and 2 sits on a center of symmetry such that the two aromatic rings are in an anti conformation with respect to one another across the piperazine ring. The molecules (1, 2) forms a tilted layer structure via intermolecular C-H∙∙∙O and C-H∙∙∙π interactions in 1 and intermolecular C-H∙∙∙O, C-H∙∙∙N, and C-H∙∙∙π interactions in 2.