Angewandte Chemie International Edition

Cover image for Vol. 54 Issue 36

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. 10/1995)

34_10/1995The cover picture shows the arrangement of two 1:1 complexes composed of a cyclic zinc porphyrin tetramer (Zn41) and a central meso-tetra-4-pyridyl-porphyrin unit (H2-Py4P) in the solid state (view along the c axis; purple = N, blue = C, yellow = Zn). The central porphyrin ligand, which is coordinated to each zinc center in Zn41 through an N atom of a pyridyl unit, locks the five-porphyrin assembly in a single conformation. NMR spectra indicate that the complex H2-Py4P·Zn41 prefers to adopt a tub-shaped geometry reminiscent of cyclooctatetraene. The picture was produced with the program Insight II from Biosym Technologies of San Diego using a Silicon Graphics Workstation. We would like to thank Dr. Robert Thomas and Prof. Dr. François Diederich (ETH Zürich Switzerland) for their help in producing this picture. Further details of the structure and fluorescence properties of this multicomponent system are reported by S. Anderson et al. on pp. 1096ff.

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