Metal-Catalyzed Reactions of Alkynes. Part XIV. This work was supported by the National Science Council of Taiwan (NSC 101-2628M-006-002-MY3 and NSC 99-2113M-260-007-MY3). We also thank Prof. S.-L. Wang and Ms. P.-L. Chen (National Tsing Hua University, Taiwan) for the X-ray structure analysis.
Synthesis, Structural Analysis, and Properties of Circulenes†
Article first published online: 21 JUN 2013
Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Angewandte Chemie International Edition
Volume 52, Issue 30, pages 7791–7794, July 22, 2013
How to Cite
Feng, C.-N., Kuo, M.-Y. and Wu, Y.-T. (2013), Synthesis, Structural Analysis, and Properties of Circulenes . Angew. Chem. Int. Ed., 52: 7791–7794. doi: 10.1002/anie.201303875
- Issue published online: 17 JUL 2013
- Article first published online: 21 JUN 2013
- Manuscript Received: 6 MAY 2013
- National Science Council of Taiwan. Grant Numbers: NSC 101-2628M-006-002-MY3, NSC 99-2113M-260-007-MY3
Polygons: Circulenes were easily prepared by Pd-catalyzed annulations of tetraiodotetraphenylenes with alkynes. Their saddle-shaped structure with an radialene character was identified by X-ray crystallography. Similar to 1,3,5,7-cyclooctatetraene, they have a tub-shaped eight-membered ring, but all of the bond lengths and bond angles are almost equal. Variable-temperature NMR investigations showed interesting dynamic behavior.