Cyclic In-Plane Electron Delocalization (σ-Bishomoaromaticity) in 4N/5e Radical Anions and 4N/6e DianionsGeneration, Structures, Properties, Ion-Pairing, and Calculations

2000 ◽  
Vol 122 (43) ◽  
pp. 10650-10660 ◽  
Author(s):  
Kai Exner ◽  
Oliver Cullmann ◽  
Markus Vögtle ◽  
Horst Prinzbach ◽  
Birgit Grossmann ◽  
...  
Keyword(s):  
Ion Pairing ◽  
Electron Delocalization ◽  
Radical Anions

Elektronentransfer und Ionenpaar-Bildung, 7 [1, 2] Kontakt-Ionenpaare Schwefel enthaltender Radikalanionen / Electron Transfer and Ion Pairing, 7 [1, 2] Contact Ion Pairs of Sulfur-Containing Radical Anions

1988 ◽  
Vol 43 (10) ◽  
pp. 1240-1246 ◽  
Author(s):  
Hans Bock ◽  
Peter Hänel ◽  
H.-F Herrmann ◽  
Heindirk torn Dieck
Keyword(s):  
Electron Transfer ◽  
Ion Pairs ◽  
Ion Pairing ◽  
Radical Anions ◽  
Contact Ion Pairs ◽  
Sulfur Containing

The structurally different radical anions M⊖ of peralkylated 1-sila-2,5-diazacyclopentane-3,4-dithione and of tetrakis(isopropylthio)-p-benzoquinone are generated by reduction with potassium/2.2.2-cryptand under aprotic conditions in THF solution. On addition of Li⊕B(C6H5)4⊖, both form hitherto elusive sulfur-containing contact ion pairs, which are characterized by their ESR/ENDOR spectra.

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