How is the structure of nickel DMG
|Brief description||colorless, odorless powder|
|Molar mass||116.119 g mol−1|
|Melting point||240-241 ° C|
|As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions.|
Diacetyl dioxime or Dimethylglyoxime (Abbreviation: DADO) is an organic-chemical complexing agent.
Diacetyldioxime is a complexing agent that forms colored chelate complexes with heavy metals such as Ni, Fe, Bi, Co, Cu, Pb, Pt, Pd and Re salts.
In particular, the raspberry-red nickel diacetyl dioxime complex in alkaline solution serves as qualitative evidence and is used for quantitative determination (photometry) for nickel salts. The color can still be diluted up to 1:106 be recognized. Interfering ions can be masked with citric acid in an alkaline solution.
The following colorations / precipitates form in ammoniacal solutions:
- Nickel: raspberry red
- Copper: brownish red
- Iron (III): red
- Cobalt: brownish red
- Bismuth: intense yellow
- Lead: white (voluminous, finely divided)
- Palladium: yellow-yellowish
- Saturated solution of dimethylglyoxime in 96% ethanol
- Aqueous solution with 0.1 mol / l disodium bis (dimethylglyoximate)
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