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Dimethylglyoxime

Dimethylglyoxime (C4H8N2O2) is basically a white powder abbreviated as dmgH2 for neutral form and dmgH for anionic form, where H stands for hydrogen.

Structure & Formula

The chemical formula of Dimethylgloxime is C4H8N2O2 (CH3C(NOH)C(NOH)CH3) and the structure for dimethylglyoxime is shown below.

Structure for dimethylglyoxime
Structure for dimethylglyoxime (Source)

Properties of Dimethylglyoxime

Now, let’s move on to the discussion of properties of this compound which implies physical properties and chemical properties.

Physical Properties

OdorNo odor
AppearanceOff-white powder
Complexity112
Dipole Moment0
SolubilityInsoluble in water, soluble in alcohol

Chemical Properties

  • The density of dimethylglyoxime is 1.37 g/cm3.
  • It has a molecular weight of 116.12 g/mol.
  • The boiling point is not determined.
  • Melting point for this chemical compound is 240℃ to 241℃.
  • Nickel cation(Ni+2) reacts with the compound to form an insoluble red precipitate of nickel dimethylglyoxime.
    Ni+2 + 2C4H8N2O2 → Ni(C4H7N2O2)2 + 2H+
  • The compound reacts with ferrous sulfate and ammonium hydroxide to form a complex compound of iron and ammonium sulfate and water.
    FeSO4 + 2NH4OH + 2C4H8N2O2 → Fe(C4H7N2O2)2 + (NH4)2SO4 + 2H2O

Preparation of Dimethylglyoxime

It can be prepared from butanone. First, by a reaction with ethyl nitrite to give diacetyl monoxime. The second oxime is then installed using sodium hydroxylamine monosulfonate.

Preparation of Dimethylglyoxime
Preparation of Dimethylglyoxime (Source)

Applications of Dimethylglyoxime

  • The compound is used extensively in analytical chemistry for different metal ions such as platinum, palladium, etc., in the form of detecting reagent, precipitating reagent, and photometric reagent.
  • It is used as a test for nickel release and used for jewelry.
  • It can also be used as a specific precipitant for nickel and palladium.

Hazards

The chemical compound is hazardous as it is toxic and is a source of skin or eye irritants. It also has harmful effects if swallowed. The compound has also been observed to be flammable.

FAQs

What type of ligand is dimethylglyoxime?

It is a bidentate ligand chelating large amounts of metals.

Is Demythglyoxime dangerous?

The chemical compound is hazardous as it is toxic and is a source of skin or eye irritants. It also has harmful effects if swallowed. The compound has also been observed to be flammable.

What is the IUPAC name of Dimethylglyoxime?

Its IUPAC name is N-(3-nitrosobut-2-en-2-yl)hydroxylamine

What is the formula of Dimethylglyoxime?

Its chemical formula is C4H8N2O2

Why is Dimethylglyoxime insoluble in water?

It is a neutral complex which is the reason for its insolubility i.e it is insoluble since there are no charges on the compound to bind and solve the ion by polar water molecules.

More Compounds

Copper Hydroxide (Cu(OH)2)Hydrosulfuric Acid (H2S)
Chlorine Trifluoride (ClF3)Ammonium persulfate (NH4)2S2O8
Sodium Sulfate (Na2SO4)Chromic Acid (H2CrO4)

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