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Note | Regular issue | Vol 78, No. 10, 2009, pp.2601-2607
Published online, 15th July, 2009
DOI: 10.3987/COM-09-11776
■ Crystal Structure and Intramolecular Hydrogen Bonding of a Substituted Diaminoquinoxaline

Junpei Kuwabara, Hironori Mori, and Takaki Kanbara*

*Graduate School of Pure and Applied Sciences, Tsukuba Research Center for Interdisciplinary Materials Science, University of Tsukuba, 1-1-1 Ten-nodai, Tsukuba-shi, Ibaraki 305-8573, Japan

Abstract

A substituted diaminoquinoxaline, 2,3-diethyl-N5,N8-di(quinolin-8-yl)quinoxaline-5,8-diamine, was synthesized and characterized by a single-crystal X-ray diffraction study. The crystal structure of the molecule has a planar geometry with intramolecular hydrogen bonding. The hydrogen bonding is also evaluated in a solution state by spectroscopic techniques.