کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1302318 | 1498966 | 2012 | 4 صفحه PDF | دانلود رایگان |
Treatment of a mixture of isomeric N-ethyl-4(5)-nitro-1,2,3-triazoles with copper(II) chloride or copper(II) perchlorate was found to yield crystalline complexes with 1-ethyl-5-nitro-1,2,3-triazole (entz), namely [Cu(entz)2Cl2] or [Cu(entz)4(H2O)2](ClO4)2, respectively. The obtained complexes, being the rare examples of coordination compounds of vicinal nitrotriazoles, have been characterized by X-ray diffraction and thermal methods. Both compounds present mononuclear complexes with entz сoordinating through N3 atom of heterocycle. The complexes are readily decomposed under action of aqueous ammonia generating pure 1-ethyl-5-nitro-1,2,3-triazole with high yield. Succession of complexation and decomplexation reactions was shown to be a simple procedure for isolation of 1-ethyl-5-nitro-1,2,3-triazole from isomeric mixtures formed under alkylation of 4-nitro-1,2,3-triazole.
Pure crystalline complexes of 1-ethyl-5-nitro-1,2,3-triazole were formed under treatment of a mixture of isomeric N-ethyl-4(5)-nitro-1,2,3-triazoles with copper(II) salts.Figure optionsDownload as PowerPoint slideHighlights
► Copper(II) salts react selectively with 1-ethyl-5-nitro-1,2,3-triazole.
► New examples of rare complexes with vicinal nitrotriazoles.
► 1-Ethyl-5-nitro-1,2,3-triazole coordinates through N3 atom of heterocycle.
► Complexes are decomposed under action of aqueous ammonia generating pure ligand.
► Selective complexation–decomplexation technique for separation of isomeric azoles.
Journal: Inorganic Chemistry Communications - Volume 24, October 2012, Pages 77–80