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Complexes of lanthanide chlorides with macrocyclic polyethers

โœ Scribed by Franco Benetollo; Gabriella A. Bombieri; Giovanni de Paoli; David L. Hughes; David G. Parsons; Mary R. Truter


Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
169 KB
Volume
94
Category
Article
ISSN
0020-1693

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๐Ÿ“œ SIMILAR VOLUMES


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Complexes of some thallium(I) salts with macrocyclic crown ethers have been prepared. Complexes of benzo-15crown-5 (I) and 4,5dibromo-benzo 15-crown-5, (II), appear to have a sandwich structure where two molecules of the ligand are co-ordinated to one thallium ion. Complexes of I8-crown-6, (IV) have

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## Alkaline earth metal perchlorates and thiocyanates react with cyclic polyethers to yield crystalline solids. The products are found to be influenced by cation radius and charge, and also by the reaction solvent and anion. Competition reactions between potassium and calcium are shown to be solvent

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## Abstract Enrichment of the potassium isotopes is achieved by means of the chemical exchange reaction Where L represents a macrocyclic polyether. Dicyclohexylโ€18โ€crownโ€6 ((__cis__โ€__syn__โ€__cis__)โ€isomer) was investigated. The single stageโ€separation factor a=1+ฮต was determined according to the

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Recently a number of macrocyclic compounds have been discovered which are capable of forming complexes with alkali metal ions (for reviews see refs. 1-3). They belong to naturally occurring species as depsipeptides ~ or macrotetrolides z ,4 as well as to synthetic compounds like cyclic polyethers 3

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Controlling the chirality of metal complexes or supramolecular assemblies continues to be a challenging and fascinating area of research. [1] The chirality of these systems may be related, for example, to the spatial disposition of chelating ligands around a metal ion, [1a] to the formation of doubl