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involves the separation of repulsive charges as well as the migration of a very mobile proton, we are not surprised that fci = 1.4 X 106 sec-1 for this reaction is a great deal larger than the 25°first-order rate constant hi* ~10""5 to 10~8 sec-1 reported24 for the much studied reaction fcl* Cr(H20)es+--> Cr(H20)53+ + H20 that bears it a superficial resemblance. The iondipole attractive interaction in this latter reaction as well as the lower mobility of H20 than H+ could account for a markedly lower ki* than h.(24) M. Eigen and R. G. Wilkins in "Mechanisms of Inorganic Reactions," Advances in Chemistry Series, No.

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Untersucht werden die Oberflächenspezies wie durch H‐Bindung an die Oberfläche gebundene Alkohol‐Individuen, an Lewis‐Säure‐Stellen (Al3+ ) chemisorbierte Alkoholat‐Strukturen, Strukturen mit Partialdoppelbindung, die bei der Desorption ein Olefin liefern, sowie Carboxylat‐Individuen, die sogar bei höheren Temperaturen stabil sind.