| 1 | Author
| Z. Naturforsch | Requires cookie* | | Title
| Zinn(IV)  | | | Abstract
| Komplexe mit diaciden Azo(hydrazono)verbindungen. Kristallstruktur von Bis[4-(2'-hydroxyphenylazo)-3-methyl-l-phenyl-pyrazol-5-onato(2-)]zinn(IV) Tin(IV) Complexes with Diacidic Azo(hydrazono) Compounds. Crystal Structure of Bis[4-(2'-hydroxyphenylazo)-3-methyl-l-phenyl-pyrazol-5-onato(2-)]tin(IV) Wolfgang Banße3, Tin(IV) complexes of diacidic azo and hydrazono compounds were synthesized by the reaction of these ligands with SnCl2acac2 and SnCl2 • 2H20 , respectively. The complexes were further characterized by Mössbauer spectroscopy. For bis[4-(2'-hydroxyphenylazo)-3-methyl-l-phenyl-pyrazol-5-onato(2-)]tin(IV) force field calculations have been performed and the crystal structure was determined by X-ray analysis. | | |
Reference
| Z. Naturforsch. 52b, 237—242 (1997); eingegangen am 16. Oktober 1996 | | |
Published
| 1997 | | |
Keywords
| Tin(I V) Complexes, Diacidic Azo Compounds, Mössbauer Spectroscopy, Molecular Mechanics Study, Crystal Structure | | |
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| default:Reihe_B/52/ZNB-1997-52b-0237.pdf | | | Identifier
| ZNB-1997-52b-0237 | | | Volume
| 52 | |
2 | Author
| Giacomo Cao, Giorgio Concas, Anna Corrias, Roberto Orru ', Giorgio Paschina, Barbara Simoncini, Giorgio Spano | Requires cookie* | | Title
| Investigation of the Reaction between Fe 2 0 3 and Al Accomplished by Ball Milling and Self-Propagating High-Temperature Techniques  | | | Abstract
| In this work we investigate the mechanism of product formation of the aluminothermic reaction of Fe 2 0 3 in the presence of A1 2 0 3 using Ball Milling and Self-propagating High-temperature techniques. Results obtained by experiments under either argon or air atmosphere are analysed by X-ray diffraction and Mössbauer spectroscopy, together with microstructure observations. It is shown that ball milling products are strongly affected by the kind of atmosphere, while self-propagating high-temperature ones are only weakly influenced. Reaction mechanisms taking place in these cases are proposed. While ball milling involves only solid state reactions, the formation of a melt occurs under self-propagating high-temperature conditions. | | |
Reference
| Z. Naturforsch. 52a, 539—549 (1997); received April 25 1997 | | |
Published
| 1997 | | |
Keywords
| Aluminothermic reduction, Ball Milling, Self-propagating High-temperature Synthesis, Mössbauer spectroscopy, X-ray diffraction, Mechanism of reaction | | |
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| default:Reihe_A/52/ZNA-1997-52a-0539.pdf | | | Identifier
| ZNA-1997-52a-0539 | | | Volume
| 52 | |
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