Condensation Products from the Anionic Radicals of C60 and the Common Solvent: Hexamethylphosphoramide
| Autor: | Richard C. Reiter, Cheryl D. Stevenson, James R. Noyes |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Radical
Inorganic chemistry Alkali metal Surfaces Coatings and Films law.invention Metal chemistry.chemical_compound Crystallography Hexamethylphosphoramide chemistry law visual_art Materials Chemistry visual_art.visual_art_medium Moiety Physical and Theoretical Chemistry Multiplicity (chemistry) Electron paramagnetic resonance Hyperfine structure |
| Zdroj: | The Journal of Physical Chemistry B. 106:10369-10373 |
| ISSN: | 1520-5207 1520-6106 |
| DOI: | 10.1021/jp026591s |
| Popis: | Both freshly sublimed C 6 0 and "off-the-shelf' C 6 0 were reduced with the alkali metals in hexamethylphosphoramide (HMPA). When pure C 6 0 is reduced to its trianion radical, it condenses with a molecule of HMPA to yield C 6 0 3-(HMPA)_, which exhibits a typical EPR pattern for a system with a doublet multiplicity and hyperfine splitting from the 3 1 P (a 3 1 P = 0.93 G). When Rb or Cs serves as the reducing metal, hyperfine is observed from the metal cation (a 1 3 3 Cs = 0.78 G, a 8 7 Rb = 1.393 G), which is involved in tight ion association with the P=O moiety (C 6 0 3-(HMPA)_,M + ). The small cations do not form intimate ion pairs, and both C 6 0 3-(HMPA)_ and C 6 0 3-(HMPA) 2 are present in solution when M = Na or Li. The latter species exhibits an EPR splitting from two 3 1 Ps. The "off-the-shelf" C 6 0 contains C 1 2 0 O as an impurity. Extensive reduction of this impurity results in a charged multianionic state where very large splittings from three 3 1 Ps are observed. |
| Databáze: | OpenAIRE |
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