Molecular Borromean Rings. Borromean rings are three interlocked rings that rely on the presence of all three components to stay together. In the article by Stoddart and co-workers, students synthesize a Borromean link in molecular form during a laboratory project that incorporates synthetic organic, physical organic, inorganic, metallo-organic, supramolecular, and dynamic covalent chemistry. As shown on the cover, the Borromean rings can be represented in many ways: as a planar Venn diagram, in an orthogonal arrangement, and with a chemical twist (where the transition metals are imbedded in the nodes, or binding sites). In addition, an X-ray crystal structure of the synthesized Borromean rings is depicted in a tubular and a space-filling representation.
The "Chemistry Teacher Connection" (CTC) is especially for high school chemistry teachers. For only $40/year, it offers an online-only subscription to CLIC along with membership in the Division of Chemical Education, normally $65/year. CTC subscribers receive access to all articles and supplements from 1996 through the current issue.
Through special arrangement with the ACS, JCE High School CLIC is now able to provide subscribers with online access to Chemical & Engineering News articles that have been selected specifically for secondary science instructors and their students.
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