BESTIMMUNG DER IONENPAAR-BASIZITAT VON LITHIUM- UND KALIUMAMIDEN
Ion pair basicities of lithio and potassio salts of some secondary amines were determined by equilibration with benzyl compounds.With these bases it is possible to span a range of about 19 pK-units from pK = 27 up to 46.The structural dependence of thermodynamic as well as kinetic basicity is discussed.Some new effective amide bases for preparative purposes are recommended.For the first time the pK-value of toluene has been determined by direct equilibration.It amounts to 40.7 in tetrahydrofuran.
Ahlbrecht, Hubertus,Schneider, Gunther
p. 4729 - 4742
(2007/10/02)
Substituent Effect on the Electrochemical Oxidation of Arylmethyl Anions. 3. Effect of Methyl Substitution on Diarylmethyl Anions
Electrochemical oxidation of a series of diarylmethyl anions was examined.Twelve varingly substituted groups including methyl, dimethyl, ring, and a CH2N(CH3)2 group were studied as the lithium salts in dimethoxyethane/tetramethylethylenediamine by use of
Bank, Shelton,Schepartz, Alanna,Giammatteo, Paul,Zubieta, Jon
p. 3458 - 3464
(2007/10/02)
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