ISSN:
0009-2940
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Separation of the Intermediates of the Acid Hydrolysis of Tris(salicylaldehydato)chromium(III) and Kinetics of the Acid Hydrolysis of the Cation Tetraaquamono(salicylaldehydato)chromium(III)The intermediates of the acid hydrolysis of tris(salicylaldehydato)chromium(III) were separated and identified by ion exchange and electrophoresis to be the cations diaquabis(salicylaldehydato)chromium(III) and tetraaquamono(salicylaldehydato)chromium(III) (= [Cr(SA)(H2O)4]2+). The hydrolysis of the cation [Cr(SA)(H2O)4]2+ with perchloric acid is of pseudo-first order and leads to the cation [Cr(H2O)6]3+. For constant ionic strength (I = 3) and [HCIO4] = 0.1-3 N kexp = k′ + k″[H+] is deduced. The mechanism is discussed on the basis of the ΔH≠-and ΔS≠ values obtained.
Notes:
Als Zwischenprodukte der Säurehydrolyse von Tris(salicylaldehydato)chrom(III) wurden durch Ionenaustausch und Elektrophorese die Kationen Diaquabis(salicylaldehydato)chrom(III) und Tetraaquamono(salicylaldehydato)chrom(III) (= [Cr(SA)(H2O)4](2+) identifiziert. Die Hydrolyse des [Cr(SA)(H2O)4]2+-Kations mit Perchlorsäure führt in einer Reaktion pseudo-erster Ordnung zum [Cr(H2O)6]3+-Kation. Für konstante Ionenstärke (I = 3) und [HCIO4] = 0.1-3 N gilt: kexp = k′ + k″[H+]. Der Mechanismus wird anhand der ermittelten ΔH≠- und ΔS≠-Werte diskutiert.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19771100908
