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Coronands alkali metal complexes

As in the coronands, binding site identity plays an important role in the complexation preferences of cryptands. Replacement of oxygens by sulfur or nitrogen in the bridges (45b-d) results in decreased stability and selectivity for alkali metal and alkaline earth cations (as was also noted for the coronands).66,164 Selectivity is then shifted toward softer metal ions such as Ag+, Tl+, Cd2+ and Pb2+. [Pg.938]

Selective complexation of alkali metals by metalloceno-coronands has also been observed some have strong selectivity for potassium relative to both Na+ and Cs+ [77]. [Pg.40]

These ligands form different host-guest complexes, 39, and the redox potential of the ferrocene-ferricinium couple is sensitive to coronand complexation by alkali metals [84a]. [Pg.40]

Crown-type compounds have led to considerable progress in the field of metal solutions, since they strongly enhance the solubility of alkali metals in a variety of solvents [235]. As is to be expected, the more strongly complexing cryptands are more efficient than the coronands however, they differ in the type of counterion formed (metal anions are favored in the case of crown ethers. [Pg.314]

See other pages where Coronands alkali metal complexes is mentioned: [Pg.17]    [Pg.24]    [Pg.35]    [Pg.931]    [Pg.327]    [Pg.1577]    [Pg.1874]    [Pg.580]    [Pg.61]    [Pg.48]    [Pg.928]    [Pg.1574]    [Pg.1116]   
See also in sourсe #XX -- [ Pg.3 , Pg.37 , Pg.38 , Pg.39 , Pg.40 , Pg.41 , Pg.42 , Pg.43 , Pg.44 ]

See also in sourсe #XX -- [ Pg.3 , Pg.3 , Pg.37 , Pg.38 , Pg.39 , Pg.40 , Pg.41 , Pg.42 , Pg.43 , Pg.44 ]



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Alkali complex

Alkali complexation

Alkali metals complexes

Coronands

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