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The Stabilities of the o ‐Carboxyphenylhydrazo‐Ethylacetoacetate OF Cu, Ni, Co, Zn, Mn and Cd Chelate Compounds in Different Solvents
Author(s) -
ElShetary Basheir A.,
Zahra Ahmed M.,
Taha Atef A.,
Ibrahim Aesha I.
Publication year - 1985
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.198500008
Subject(s) - chemistry , chelation , dissociation (chemistry) , electronegativity , divalent , aqueous solution , inorganic chemistry , ligand (biochemistry) , metal , dissociation constant , stability constants of complexes , ion , divalent metal , copper , acid dissociation constant , metal ions in aqueous solution , organic chemistry , receptor , biochemistry
Abstract The dissociation constants for o ‐carboxyphenylhydrazoethylacetoacetate ( o ‐CPHEA) ligand, as well as the stability constants for the divalent metal complexes of Cu, (II), Ni (II), Co (II), Zn (II)and Cd (II) ions, have been calculated p H‐meterically in different solvents. The dissociation constans p K 1 =4.10 and p K 2 =10.55 of the insoluble organic ligand are calculated in aqueous medium. The effect of solvents, the relation between stabilities and both electronegativities and ionization potential are studied.