Abstract
The Front Cover illustrates the reaction conditions of β-propiolactone in the superacidic system HF/SbF5 at low temperatures. The reflection on the water surface is representative for the equal conditions with exception of the reaction temperature. Here, the water surface represents the temperature limit of −40 °C. Below this temperature, the formation of monoprotonated 3-hydroxypropanoyl fluoride occurs exclusively, while above this temperature, exclusively triprotonated species of 1,5,9-trioxacyclododecane-2,6,10-trione is formed. Cover design by Stefanie Beck. More information can be found in the Article by A. J. Kornath et al.
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