INOR 235 |
| James L. Dye, Department of Chemistry, Department of Chemistry, Michigan State University, East Lansing, MI 48824 |
| Electron spin-pairing (bipolaron formation) is ubiquitous in solvated electron solutions and in crystalline electrides. But we don't consider this to be a chemical bond between electrons – but should we? Some crystalline salts that contain alkali metal anions (alkalides) show dimer or chain formation. The resulting internuclear distances are as much as 1.0Å shorter than the sum of the van der Waals radii of the anions. What is the nature of this bonding? When all-silica zeolites are loaded with cesium from the vapor phase, ionization occurs to form Cs+ and delocalized electrons. But even with dilute loadings, dimers and/or chains form in the channels. Do the electrons form a "bond" between Cs+ ions separated by 5.2Å? Experimental evidence for the formation of spin-paired species of these types will be presented in the hope that theoreticians can be persuaded to further consider the nature of such "bonding" in condensed phases. |
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Contemporary Aspects of Chemical Bonding
8:40 AM-12:00 PM, Monday, September 8, 2003 Javits Convention Center -- 1A26/1A27, Oral
Division of Inorganic Chemistry |