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A combined experimental and computational study of the ionic‐liquid‐mediated dehydration of glucose and fructose by CrII and CrIII chlorides has been performed. The ability of chromium to selectively dehydrate glucose to 5‐hydroxymethylfurfural (HMF) in the ionic liquid 1‐ethyl‐3‐methyl imidazolium chloride does not depend on the oxidation state of chromium. Nevertheless, CrIII exhibits higher activity...
Transient self‐organization of Cr complexes into binuclear structures is the key to the selective dehydration of glucose to 5‐hydroxymethylfurfural by chromium chlorides in ionic liquids. In their Full Paper on page 5281 ff., E. J. M. Hensen et al. demonstrate that the mechanism of the selective glucose transformations does not depend on the oxidation state of the chromium catalyst. Because of its...
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