Angewandte Chemie International Edition

Cover image for Vol. 56 Issue 14

Editor: Peter Gölitz, Deputy Editors: Neville Compton, Haymo Ross

Online ISSN: 1521-3773

Associated Title(s): Angewandte Chemie, Chemistry - A European Journal, Chemistry – An Asian Journal, ChemistryOpen, ChemPhotoChem, ChemPlusChem, Zeitschrift für Chemie

50_25/2011Cover Picture: Redox-Controlled Magnetic {Mn13} Keggin Systems (Angew. Chem. Int. Ed. 25/2011)

Manganese oxide nanoclusters with α-Keggin-type cores and redox-tunable magnetic behavior were synthesized by H. Oshio et al. In their Communication on page 5716 ff., they report that the clusters could be oxidized in one-electron steps, leading to increases in the single-molecule-magnetic properties. The image shows the transition from a {Mn13}4+ species through {Mn13}5+ to {Mn13}6+ and the changes in the resultant hysteretic responses.

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Also of Interest

Synthetic Methodsfor001

Nitrosocarbonyl hetero-Diels–Alder (HDA) reactions lead directly and stereospecifically to 3,6-dihydro-1,2-oxazines, which can be transformed into biologically active molecules. The Review from M. J. Miller and B. S. Bodnar on page 5630 ff. provides numerous examples.

Reactivities of C–H Bondsfor002

The relative reactivities of C-H bonds in two MnIV complexes do not correlate with their bond dissociation energies, as described by M. Costas et al. in the Communication on page 5648 ff.

Uranium Clustersfor003

In their Communication on page 5745 ff., M. Mazzanti et al. present a reproducible method for the synthesis of low-valent uranium clusters. Benzoic acid is used to promote formation, and cluster size can be tuned by the choice of solvent and base.