Dimethylglyoxime is a chemical compound described by the formula CH3C(NOH)C(NOH)CH3. Its abbreviation is dmgH2 for neutral form, and dmgH for anionic form, where H stands for hydrogen. This colourless solid is the dioxime derivative of the diketone butane-2,3-dione (also known as diacetyl). DmgH2 is used in the analysis of palladium or nickel. Its coordination complexes are of theoretical interest as models for enzymes and as catalysts. Many related ligands can be prepared from other diketones, e.g. benzil.
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Preparation[edit]
Start with the mass of Ni (DMG)2 2. Convert to mole Ni (DMG)2 (DMG = C4H6 (NOH)2) 3. By stochiometry, determine the mole Ni2+. Use the equation above. The mole ratio of Ni2+ to Ni (DMG) is 1:1. Convert Ni2+ to mass Ni2+ 5.% Ni in ore = mass Ni2+/mass ore x 100. 1 Answer to Dimethylglyoxime, DMG, is an organic compound used to test for aqueous nickel(II) ions. A solution prepared by dissolving 65.0 g of DMG in 375 g of ethanol boils at 80.3°C. What is the molar mass of DMG? Kb = 1.22°C/m, boiling point of pure ethanol = 78.5°C - 447638.
Dimethylglyoxime can be prepared from butanone first by reaction with ethyl nitrite to give biacetyl monoxime. The second oxime is installed using sodium hydroxylamine monosulfonate:[1] Soubor dmg.
Complexes[edit]![]()
Dimethylglyoxime is used to detect and quantify nickel, which forms the bright red complex nickel bis(dimethylglyoximate) (Ni(dmgH)2). The reaction was discovered by L. A. Chugaev in 1905.[2]
Cobalt complexes have also received much attention. In chloro(pyridine)cobaloxime[3] the macrocycle [dmgH]22− Full dmg christine vainglory game. mimics the macrocyclic ligand found in vitamin B12.
Ni Dmg 2 Molar Mass
Structure of chloro(pyridine)cobaloxime.
Molar Mass Of Ni Dmg 2References[edit]
Massa Molar Ni(dmg)2
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