Angewandte Chemie International Edition

Cover image for Vol. 56 Issue 19

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

Cover Picture: A Dinuclear, Triple-Stranded Helicate with a Diamide-Bridged Catechol/Benzenedithiol Ligand (Angew. Chem. Int. Ed. 36/2004)

43_36/2004Helices are a universal structure. They are found in all sizes from molecular species to spiral nebula. The cover picture shows a dinuclear, triple-stranded helicate containing a novel ligand with a catecholato and an o-benzenedithiolato donor group. Only the regioisomer with a parallel orientation of the ligands is formed and from only one pair of enantiomers. For more information, see the Communication by F. E. Hahn et al. on page 4807 ff.

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Also of Interest

Reaction Mechanismsfor001

P. Espinet and A. M. Echavarren have gone through the mechanism of the Stille coupling reaction with a fine-tooth comb. See their Review on page 4704 ff. to find out which factors determine the intermediates formed in the individual reaction steps.

Heterocycle Synthesisfor002

Tetrathiafulvalene acts as a leaving group in the oxidative cyclization reactions leading to a new bithiazole-type ring assembly. The synthesis and properties of this heterocycle are described by S. Decurtins and co-workers on page 4738 ff.

Nanomechanical DNA Devicesfor003

Nanomechanical devices are promising probes for performing measurements at the molecular level. N. C. Seeman and co-workers explain on page 4750 ff. the structure and function of a “DNA machine” obtained by linking two triple-helical DNA motifs with a shaft of conventional DNA.