ISSN:
0018-019X
Schlagwort(e):
Chemistry
;
Organic Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
Electron Transfer and Ion-Pair Formation: Titrations of Tetracyanoethene by Alkaline and Alkaline Earth Metals in Aprotic SolutionFor alkaline and earth alkaline metal ‘titrations’ of the π-acceptor tetracyanoethene in aprotic (c(H⊕) 〈 0.1 ppm) solution, UV/VIS and ESR spectra have been measured in a sealed glas apparatus. Isosbestic points prove uniform but differing metal-mirror reduction processes for [Li]x, [Na]x, and [K]x vs. [Cs]x. The formation of solvent-shared or solvent-separated contact ion pairs detected is supported by subsequent crystallization and structure determination. For the tetracyanoethene radical anion, semiempirical PM3 calculations with limited configuration interaction allow to reproduce the structural data as well as the long-wavelength charge transfer excitation.
Zusätzliches Material:
6 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/hlca.19970800216
