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The Complexation of Some Sodium Sulphophenyl Hydrazo‐5‐Pyrazolone Dyes Towards Trivalent Lanthanide Ions “Stability Constants”

 

作者: B. El‐Shetary,   S.L. Stefan,   F. Zidan,   M.S. Moez,  

 

期刊: Journal of the Chinese Chemical Society  （WILEY Available online 1986）
卷期: Volume 33, issue 1  

页码: 41-47

 

ISSN:0009-4536

 

年代: 1986

 

DOI:10.1002/jccs.198600005

 

出版商: WILEY‐VCH Verlag

 

关键词: 1‐phenyl‐3‐methyl‐4‐(sulphonic phenyl hydrazo)‐5‐pyrazolone ligands;stability of Lanthanide (III)

 

数据来源: WILEY

 

摘要:

AbstractAcid dissociation constants of substituted‐5‐pyrazolone dyes have been determined potentiometrically in 75%(v/v)dioxane‐water mixture at 30°C and<0.1 ionic strength. The stability constants of their 1:1 and 1:2 chelates with tweleve trivalent lanthanide ions have been determined under the same conditions. The data were correlated and the results were taken to explain the stabilization of such. chelates by dative π ‐bonding between Ln (III) and t

 

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