کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1341064 | 1500295 | 2005 | 9 صفحه PDF | دانلود رایگان |
An effective procedure has been developed for the synthesis of the potassium salt of 4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-1-oxyl-3-oxide-2-carboxylic acid K(1). The salts of 4,4,5,5-tetramethyl-1-oxyl-4,5-dihydro-1H-imidazole-2-carboxylic acid X(2) are kinetically much more stable than K(1). Due to this, a series of heterospin complexes Cu(2)2(CH3OH)2, Cu(2)2(H2O)2, Cu(2)2, Co(2)2(CH3OH)2, Ni(2)2(H2O)2, Ni(2)2(py)2, and Ni(2)2(dipy) · H2O were isolated. For K(2), Cu(2)2(CH3OH)2, and Ni(2)2(py)2, crystal and molecular structure has been determined. For Cu(2)2 and Ni(2)2(bipy), cooperative magnetic ordering has been recorded at 16.6 and 4.6 K, respectively.
α-Nitronyl- (1) and α-imino nitroxide carboxylates (2) were prepared by hydrolysis of the corresponding nitriles. A series of heterospin complexes with 2 were synthesized. For K(2), Cu(2)2(CH3OH)2, and Ni(2)2(py)2, crystal and molecular structure has been determined. For Cu(2)2 and Ni(2)2(bipy), cooperative magnetic ordering has been recorded at 16.6 and 4.6 K, respectively.Figure optionsDownload as PowerPoint slide
Journal: Polyhedron - Volume 24, Issues 16–17, 17 November 2005, Pages 2176–2184