Caged peroxide: An octanuclear nickel complex, which exhibits peroxide in an unprecedented μ6‐(η1)3 coordination mode, was prepared (see structure: only the Ni8 unit with the central peroxo ligand and the bridging oxygen atoms is shown; green Ni, red O). This mode of binding finally completes the series of symmetrical μn‐(η1)n/2 peroxide binding modes in complexes.
Peroxid eingefroren in perfekter Symmetrie, die beim Blick entlang der Hauptachse an eine Schneeflocke denken lässt, findet man in einem näherungsweise S6‐symmetrischen achtkernigen Nickelkomplex (der Ni‐O‐Kern ist im Vordergrund zu sehen; Ni grün, O rot). Der Einschluss als μ6‐koordinierter Peroxoligand im Nickelkäfig stabilisiert diese reaktive Spezies. Weitere Informationen finden Sie in der Zuschrift von A.‐K. Duhme‐Klair, P. H. Walton et al. auf S. 1416 ff. (Für das Hintergrundbild danken die Autoren Prof. K. G. Libbrecht, Caltech.)
Peroxide is frozen in perfect symmetry, which if viewed down the principle axis, resembles that of the snowflake in the cover‐picture background. An unprecedented μ6 peroxide coordination mode is found in an octanuclear nickel complex with near S6 symmetry (core shown in foreground; green Ni, red O). The encapsulation of the peroxide by the nickel cage stabilizes this reactive species. For more details see the Communication by A.‐K. Duhme‐Klair, P. H. Walton, and co‐workers on page 1392 ff. (Background picture reproduced with permission from Prof. K. G. Libbrecht, Caltech.)
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