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Dimethylglyoxime
(redirected from 2,3-Butanedione Dioxime)

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dimethylglyoxime [‚dī¦meth·əl·glī′äk‚sīm]
(organic chemistry)
(CH3)2C2(NOH)2White, crystalline or powdered solid, used in analytical chemistry as a reagent for nickel.
Dimethylglyoxime 

diacetyl dioxime:

Colorless crystals; melting point, 238°-240°C. It is soluble in alcohol, ether, and solutions of alkalies. With nickel salts it yields a red insoluble precipitate of nickel dimethylglyoximate, (C4H7O2N)2Ni, which is a chelate compound. Because of this, dimethylglyoxime is used for the qualitative and quantitative determination of nickel. In 1905, L. A. Chugaev suggested the use of dimethylglyoxime as a specific reagent for nickel. Dimethylglyoxime is made by treating diacetyl with hydroxylamine.
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