Unusually Tight Ion Pairing of the 1,4- and 2,3-Di-tert-butylbuta-1,3-diene Radical Anions with Alkali-Metal Cations:  An ESR and ENDOR Study

1998 ◽  
Vol 120 (19) ◽  
pp. 4815-4824 ◽  
Author(s):  
Fabian Gerson ◽  
Henning Hopf ◽  
Pascal Merstetter ◽  
Cornelia Mlynek ◽  
Dagmar Fischer
Keyword(s):  
Alkali Metal ◽  
Metal Cations ◽  
Ion Pairing ◽  
Radical Anions ◽  
Alkali Metal Cations

The Effect of Alkali Metal Cations on The Structure of Dissolved Silicate Oligomers

1987 ◽  
Vol 111 ◽  
Author(s):  
Alon V. McCormick ◽  
A. T. Bell ◽  
C. J. Radke
Keyword(s):  
Nmr Spectroscopy ◽  
Alkali Metal ◽  
Base Composition ◽  
Ion Pairs ◽  
Metal Cations ◽  
Ion Pairing ◽  
Alkali Metal Cations ◽  
Silicate Anion ◽  
Cation Size ◽  
Dissolved Silicate

AbstractBy means of 29Si spectroscopy, it is established that the distribution of silicate anions in alkaline silicate solutions is a moderate function of base composition. At a fixed SiO2. concentration and silicate ratio, the proportion of Si present in oligomeric and cage-like structures increases in progressing from Li to Cs hydroxide. Interactions between alkali metal cations and silicate anions are investigated using NMR spectroscopy of the cations; in this way the concentration of ion pairs is measured as a function of cation size. As a result the silicate redistribution is ascribed to cation-silicate anion pairing and to a higher selectivity for ion pairing by large silicate anions as cation size increases.

Ion-pairing in polyoxometalate chemistry: impact of fully hydrated alkali metal cations on properties of the keggin [PW12O40]3− anion

2020 ◽  
Vol 49 (32) ◽  
pp. 11170-11178
Author(s):  
Alexey L. Kaledin ◽  
Qiushi Yin ◽  
Craig L. Hill ◽  
Tianquan Lian ◽  
Djamaladdin G. Musaev
Keyword(s):  
Charge Transfer ◽  
Alkali Metal ◽  
Metal Cations ◽  
Ion Pairing ◽  
Ion Pair ◽  
Alkali Metal Cations ◽  
Contact Ion Pair ◽  
Intermolecular Charge Transfer ◽  
Hydrogen Bonded

The [PW12O40]3−[M+(H2O)16]3 is a “hydrogen bonded” ion-pair complex for M = Li, Na and K, but is a “contact” ion-pair complex for M = Rb and Cs, intermolecular charge transfer from the solvated counter cations M+(H2O)16 to the anion [PW12O40]3−.

scholarly journals ESR and ENDOR Studies of the Ion Pairs of Double-, Triple-, and Quadruple-layered [2.2]Paracyclophane Radical Anions and Alkali Metal Cations

1977 ◽  
Vol 50 (8) ◽  
pp. 2074-2083 ◽  
Author(s):  
Masamoto Iwaizumi ◽  
Shouichi Kita ◽  
Taro Isobe ◽  
Masahiro Kohno ◽  
Takamitsu Yamamoto ◽  
...  
Keyword(s):  
Alkali Metal ◽  
Ion Pairs ◽  
Metal Cations ◽  
Radical Anions ◽  
Alkali Metal Cations ◽  
Esr And Endor Studies
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