A spectrophotometric study of o,o'-dihydroxyazobenzene and its chelates with aluminum,gallium and indium |
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Authors: | JRay Kirby Ronald M Milburn John H Saylor |
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Institution: | Department of Chemistry, Duke University, Durham, North CarolinaU.S.A. |
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Abstract: | The composition of the chelates of aluminum, gallium and indium with o,o'-dihydroxyazobenzene has been established in acidic alcoholic -water mixtures to be pH dependent by means of spcctrophotometric measurements. Only chelates with a 1 : 1 and 2. : 1 ratio of o,o'-dlihydroxyazobenzene to metal are formed. The first acid dissociation constant of o,o'-dlihydroxyazobenzene and the formulas and stability constants for -the chelates were determined, The stability of the chelates increased in tle order indium, aluminum, gallium. |
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