ORGN 239 |
| Piotr Kaszynski, Monika Sienkowska, Vladimir Benin, John M. Farrar, and Jason T Manka. Department of Chemistry, Vanderbilt University, Nashville, TN 37235 |
In our approach to the study of organic magnetic materials we have focused on discotic liquid crystals, which incorporate an electrically neutral, stable, p-delocalized radical system into the rigid core. Designed molecules consist of three or four-ring aromatic rigid cores containing the thioaminyl fragment, -N-S- as a radical source, and four poly(alkoxy)phenyl substituents connected to the rigid core. We have developed synthetic methodology for parent radicals 1a and 2a, and we prepared direct precursors 3a and 4a to the parent biradicals, and radicals 1b, and 2b. In our pursuit of potentially liquid crystalline radicals we have established techniques for the preparation of hexasubstituted biphenyls suitable for Suzuki coupling, and direct precursors to liquid crystalline radicals. Radical 1b was prepared in 65% spin yield based on ESR studies. Its isolation and characterization is under investigation.  |
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Heterocycles and Aromatics
8:00 AM-12:00 PM, Monday, September 8, 2003 Sheraton New York -- Royal Ballroom B, Oral
Division of Organic Chemistry |