Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5266835 | Tetrahedron Letters | 2011 | 4 Pages |
Abstract
In the solid state, the cyclophane (CP) moieties of the charge-transfer (CT) complexes of four- and five-layered [3.3]metacyclophanes (MCPs) 1 and 2 with tetracyanoethylene (TCNE) take different conformations from those in the solid state of the free MCPs. In the four-layered [3.3]MCP 1-TCNE complex, the CP moiety takes an s-shaped syn-anti-syn geometry, whereas the inner three benzene rings take the all-syn geometry and the two outer [3.3]MCP moieties have deformed anti-conformations in the five-layered [3.3]MCP 2-TCNE complex. In the crystal-packing diagrams of each complex, intermolecular CH/Ï-type interactions are observed between adjacent molecules.
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Authors
Masahiko Shibahara, Motonori Watanabe, Chang Yuan, Teruo Shinmyozu,