Net Ionic Ni Dmg 2 Ni Nh3 6 2+

Balanced equation:
Ni(NO3)2 + 2 DMG = Ni(DMG)2 + 2 NO3
Reaction type: double replacement
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Experiment 2 Qualitative Analysis Goals To use Le Chatelier's principle, complex ion chemistry, and precipitation reactions in the determination of ions in solution. We will study two groups of ions. The first group is called Group I and includes NH4 +, Ag+, Cu2+, and Bi3+.

Net Ionic Ni Dmg 2 Ni Nh3 6 2 Name

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Dimethylglyoxime
Names
IUPAC name
Other names
  • Dimethylglyoxime
  • Diacetyl dioxime
  • Butane-2,3-dioxime
  • Chugaev's reagent
Identifiers
  • 95-45-4
ChEMBL
ChemSpider
  • 10606175
ECHA InfoCard100.002.201
EC Number
PubChemCID
RTECS number
  • EK2975000
UNII
CompTox Dashboard(EPA)
  • InChI=1S/C4H8N2O2/c1-3(5-7)4(2)6-8/h7-8H,1-2H3/b5-3-,6-4+
  • InChI=1/C4H8N2O2/c1-3(5-7)4(2)6-8/h7-8H,1-2H3/b5-3-,6-4+
  • CC(=NO)C(C)=NO
Properties
C4H8N2O2
Molar mass116.120 g·mol−1
AppearanceWhite/Off White Powder
Density1.37 g/cm3
Melting point 240 to 241 °C (464 to 466 °F; 513 to 514 K)
Boiling pointdecomposes
low
Structure
0
Hazards
Main hazardsToxic, Skin/Eye Irritant
Safety data sheetExternal MSDS
GHS pictograms
GHS Signal wordDanger
H228, H301
P210, P240, P241, P264, P270, P280, P301+310, P321, P330, P370+378, P405, P501
NFPA 704 (fire diamond)
Related compounds
Hydroxylamine
salicylaldoxime
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

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.

Net Ionic Ni Dmg 2 Ni Nh3 6 2 Mods

Preparation[edit]

Dmg

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]

Complexes[edit]

Dimethylglyoxime is used to detect and quantify nickel, which forms the bright red complex nickel bis(dimethylglyoximate) (Ni(dmgH)2). Mac app store save dmg free. The reaction was discovered by L. A. Chugaev in 1905.[2]

Ni Dmg 2 Complex

Cobalt complexes have also received much attention. In chloro(pyridine)cobaloxime[3] the macrocycle [dmgH]22− mimics the macrocyclic ligand found in vitamin B12.

Structure of chloro(pyridine)cobaloxime.

References[edit]

  1. ^Semon, W. L.; Damerell, V. R. (1930). 'Dimethylglyoxime'. Organic Syntheses. 10: 22. doi:10.15227/orgsyn.010.0022.CS1 maint: multiple names: authors list (link)
  2. ^Lev Tschugaeff (1905). 'Über ein neues, empfindliches Reagens auf Nickel'. Berichte der Deutschen Chemischen Gesellschaft. 38 (3): 2520–2522. doi:10.1002/cber.19050380317.
  3. ^Girolami, G. S.; Rauchfuss, T.B.; Angelici, R. J. (1999). Synthesis and Technique in Inorganic Chemistry: A Laboratory Manual (3rd ed.). pp. 213–215.
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