DIOXETANO-CROWN ETHERS. STABILIZATION THROUGH COMPLEXATION WITH METAL IONS

1983 ◽  
Vol 12 (4) ◽  
pp. 431-434 ◽  
Author(s):  
Yoshihisa Inoue ◽  
Mikio Ouchi ◽  
Hidekazu Hayama ◽  
Tadao Hakushi
Keyword(s):  
Metal Ions ◽  
Crown Ethers

scholarly journals Dansyl - Substituted Aza Crown Ethers: Complexation with Alkali, Alkaline Earth Metal Ions and Ammonium

2011 ◽  
Vol 3 (1) ◽  
Author(s):  
Nelly Mateeva ◽  
Shihab Deiab ◽  
Edikan Archibong ◽  
Donka Tasheva ◽  
Bereket Mochona ◽  
...  
Keyword(s):  
Metal Ions ◽  
Crown Ethers ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Alkaline Earth Metal ◽  
Alkaline Earth Metal Ions ◽  
Aza Crown Ethers

Complexation of metal ions with the novel azathia crown ethers carrying anthracene pendant in acetonitrile–dichloromethane

Polyhedron ◽  
2010 ◽  
Vol 29 (3) ◽  
pp. 1069-1077 ◽  
Author(s):  
Ümmühan Ocak ◽  
Miraç Ocak ◽  
Aysel Başoğlu ◽  
Semanur Parlayan ◽  
Dilek Başaran ◽  
...  
Keyword(s):  
Metal Ions ◽  
Crown Ethers ◽  
The Novel

Critical evaluation of stability constants and thermodynamic functions of metal complexes of crown ethers (IUPAC Technical Report)

2003 ◽  
Vol 75 (1) ◽  
pp. 71-102 ◽  
Author(s):  
Francoise Arnaud-Neu ◽  
Rita Delgado ◽  
Sílvia Chaves
Keyword(s):  
Metal Ions ◽  
Metal Complexes ◽  
Stability Constants ◽  
Crown Ethers ◽  
Thermodynamic Functions ◽  
Critical Evaluation ◽  
Earth Metal ◽  
Published Data ◽  
Technical Report ◽  
Alkaline Earth Metal Ions

Stability constants and thermodynamic functions of metal complexes of crown ethers in various solvents published between 1971 and the beginning of 2000 have been critically evaluated. The most studied crown ethers have been selected: 1,4,7,10 tetraoxacyclododecane (12C4), 1,4,7,10,13 pentaoxacyclopentadecane (15C5), and 1,4,7,10,13,16 hexaoxacyclooctadecane (18C6). The metal ions chosen are: alkali and alkaline earth metal ions, Ag+, Tl+, Cd2+, and Pb2+. The solvents considered are: water, methanol, ethanol, and their mixtures, as well as acetonitrile, N,N'-dimethylformamide, dimethylsulfoxide, and propylene carbonate. The published data have been examined and grouped into two categories, “accepted” and “rejected”. The “accepted” values were considered as: (i) recommended (R), when the standard deviations (s.d.) on the constant K or on ΔrH were inferior to 0.05 lg unit or inferior to 1 kJ mol−1, respectively; (ii) provisional (P), when s.d. is superior to 0.05 and inferior to 0.2 for lg K or s.d. is superior to 1 and inferior to 2 kJ mol−1 for ΔrH; (iii) recommended 1 (R1), if the values were obtained by a single research group, but were considered reliable in comparison with related systems, and considering that the research team usually presents R-level values for other similar systems.

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