Crown-cation complex effects. III. Chemistry and complexes of monoaza-18-crown-6
β Scribed by George W. Gokel; Blanche J. Garcia
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- French
- Weight
- 224 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
β¦ Synopsis
Numerous metal ion complexes of macrocyclic polyethers, aminoethers and cryptates have been reported in the past decade.
1 Relatively few complexes and species other than metallic cations have been reported, although crown ether complexes of halogen, 2 thiourea, 3 acetonitrile, 4 ammonium ions, 5 aryldiazonium ions 6 and
π SIMILAR VOLUMES
N-Oligoethylene glycol monoaza crown ethers were prepared, and the notable effect of oxyethylene oxygen atoms of the side chain on complexing ability with sodium and potassium cations was confirmed.
In 1967 C. J. Pedersen reported that macrocycllc polyethers -"Crown"
Complexes between the heavier lanthanoid nitrates Ln(NO~3~)~3~ and 15βcrownβ5 (**1**) and 18βcrownβ6 (**2**) ethers were isolated and characterized. Both 1:1 and 4:3 complexes are formed with each Ln(III) ion, except in the case of Gd and **2**. The thermal transformation of the 1:1 complexes into t