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Relative Stabilities of Metal Derivatives of oo ‘‐Dihydroxyazo Dyes
Author(s) -
Snavely Fred A.,
Fernelius W. Conard,
Douglas Bodie E.
Publication year - 1957
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1957.tb02164.x
Subject(s) - denticity , chemistry , metal , beryllium , chelation , inorganic chemistry , dissociation (chemistry) , polymer chemistry , medicinal chemistry , organic chemistry
The relative stabilities of metal derivatives of 00 ′‐dihydroxyazo dyes (terdentate groups) have been measured potentiometrically in dioxan‐water (75: 25 by volume). The order of stability of the metal derivatives agrees with that already reported in the literature for monodentate and bidentate groups. The coordinating power of the diarylazo compounds for a given metal is proportional to the acid dissociation constants of the chelating agents. The one 0 ‐hydroxy‐ 0 ′‐carboxyazo dye which has been studied forms less stable metal derivatives than the 00 ′‐dihydroxyazo dyes and differs from them in coordinating with beryllium.