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|Section2= |Section3= |Section6= }} 4-Dimethylaminophenylpentazole is an unstable, explosive compound that contains the rare pentazole ring, which is composed of five nitrogen atoms. The electron donating effect of the 4-dimethylamino substituent on the phenyl ring makes this compound one of the more stable of the phenylpentazoles. At room temperature, its chemical half-life is only a few hours, although storage is possible at cryogenic temperatures. The compound was first prepared in 1956〔Huisgen R, I. Ugi. Zur Losung eines klassichen Problems der organischen Stickstoff-Chemie. ''Angewandte Chemie''. 1956; 68:705-706.〕〔Ugi I, R. Huisgen. Pentazole II. Die Zerfallsgeschwindigkeit der Arylpentazole. ''Chemische Berichte''. 1958; 91:531-537.〕〔Ugi I, Perlinger H, Perlinger L. Pentazole III. Kristallisierte Aryl-pentazole. ''Chemische Berichte'' 1958; 98:2324-2329,〕 along with other substituted phenylpentazoles. Studies have been conducted on various other derivatives, though necessarily limited by the instability of these compounds.〔John D. Wallis and Jack D. Dunitz. An all-nitrogen aromatic ring system: structural study of 4-dimethyl-aminophenylpentazole. ''Journal of the Chemical Society. Chemical Communications.'' 1983: 910-911.〕 Some more highly substituted derivatives, such as 2,6-dihydroxy-4-dimethylaminophenylpentazole, are slightly more stable but conversely, more difficult to make.〔(Efforts to synthesize the pentazolate anion )〕〔David Adam. The synthesis and characterisation of halogen and nitro phenyl azide derivatives as highly energetic materials. PhD dissertation, Ludwig-Maximilans-Universität München, 2001 ()〕 Current research has focused on forming transition metal complexes of these pentazole derivatives, as the pentazole ring should be stabilised by bonding to the metal centre. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「4-Dimethylaminophenylpentazole」の詳細全文を読む スポンサード リンク
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