Premium
Cover Picture (Angew. Chem. Int. Ed. Engl. 19/1995)
Publication year - 1995
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199520671
Subject(s) - cover (algebra) , cluster (spacecraft) , crystallography , chemistry , combinatorics , physics , computer science , mathematics , engineering , mechanical engineering , programming language
The cover picture shows a ball‐and‐stick model of the largest discrete cluster (700 heavy atoms) ever characterized by X‐ray structure analysis. This cluster containing 154 molybdenum (blue), 532 oxygen (red), and 14 nitrogen atoms (green) has a relative molecular mass of about 24000. A related cluster is shown as a polyhedral representation in the middle of the cavity of the “big wheel”. Remarkably both clusters were obtained from the same reaction solution, though not as a host‐guest compound as the picture may imply. Obvious questions arise regarding template effects, for example, by a fragment of the smaller cluster, and the limits of variability in the self‐assembly of materials. Further details on this impressive cluster are given by A. Müller et al. on pages 2122–2124.