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- W2006764471 abstract "Durch radiometrische Messungen werden 18 Ligandenaustauschreaktionen im System der Chloro-Bromo-Osmate(IV), [OsClnBr6−n]2−, n = O–6, in Abhangigkeit von der Temperatur und den Substituentenkonzentrationen untersucht. Die kinetische Stabilitat nimmt mit steigender Anzahl der elektronegativeren Cl-Liganden im Komplex zu. Die Reaktionen verlaufen teilweise uber Aquokomplexe als Zwischenprodukte. Die Geschwindigkeitskonstanten fur isomere Komplexe zeigen, das der trans-Effekt von Br nur wenig groser als von Cl ist, wodurch der Ligandenaustausch nicht stereospezifisch verlauft. Die Aktivierungsenergien liegen entsprechend der groseren kinetischen Stabilitat der Chloro-Bromo-Osmate(IV) hoher als fur die Chloro-Iodo-Osmate(IV).Kinetic Studies on Ligand Exchange of Chloro-Bromo-Osmates(IV)The 18 ligand exchange reactions in the system [OsClnBr6−n]2−, n = O–6, are investigated by radiometric measurements with regard to the dependence of temperature and concentrations of substituents. The kinetic stability increases with the number of more electronegative Cl ligands. The reactions proceed partly via aquo complexes as intermediates. The rate constants of isomers indicate that the trans-effect of Br is only slightly higher compared to that of Cl. Therefore ligand exchange does not run stereospecifically. Corresponding to the higher kinetic stability of the chloro-bromo-osmates(IV) activation energies are higher than those of chloro-iodo-osmates(IV)." @default.
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- W2006764471 date "1981-08-01" @default.
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- W2006764471 title "Kinetische Untersuchungen zum Ligandenaustausch an Chloro-Bromo-Osmaten(IV)" @default.
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- W2006764471 doi "https://doi.org/10.1002/zaac.19814790802" @default.
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