Angewandte Chemie International Edition

Cover image for Vol. 55 Issue 22

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, ChemPlusChem, Zeitschrift für Chemie

Cover Picture (Angew. Chem. Int. Ed. Engl. 18/1997)

36_18/1997The cover pictur shows the ball-and-stick model of a [{RhBi 7}Br 8] cluster from the structure of one of the first ternary subhalides of bismuth, Bi7 RhBr8. The seven bismuth atoms(blue) surround the central rhodium atom (yellow) forming a regular pentagonal bipyramid. The two apical bismuth atoms are each in an approximate square-planer environment of four bromine atoms. The squares are staggered and thus the {RhBi7} bipyramid is surrounded by a distorted square antiprism of bromine atoms. On closer analysis, this apparently unfavorable atomic arrangement emerges as an exceptional solution to the need to satisfy the electronic requirements of all participating atoms. More about this as yet unique molecular cluster is discussed by M. Ruck on pages 1971 ff. The graphics were generated by M. Ruck and G. Baum with the program POV-Ray.

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