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Nickel Dimethylglyoxime
Ni Dmg 2 Molar Mass

Nickel bis(dimethylglyoximate)
Names
IUPAC name nickel;N-[(Z)-3-nitrosobut-2-en-2-yl]hydroxylamine
Other names
Identifiers
3D model (JSmol)
ChemSpider
EC Number
PubChemCID
InChI=1S/2C4H8N2O2.Ni/c21-3(5-7)4(2)6-8;/h25,7H,1-2H3;/b2*4-3-;
CC(=C(C)N=O)NO.CC(=C(C)N=O)NO.[Ni]
Properties
C₈H₁₄N₄NiO₄
Molar mass	288.917 g·mol⁻¹
Appearance	red solid
Density	1.698 g/cm³
Hazards
GHS pictograms
GHS Signal word	Warning
H315, H317, H319, H335, H351
P201, P202, P261, P264, P271, P272, P280, P281, P302+352, P304+340, P305+351+338, P308+313, P312, P321, P332+313, P333+313, P337+313, P362, P363, P403+233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Nickel bis(dimethylglyoximate) is the coordination complex with the formula Ni[ONC(CH₃)C(CH₃)NOH]₂. The compound is a bright red solid. It achieved prominence for its use in the qualitative analysis of nickel.^[1]

Structure[edit]

Nickel(II) is square planar.^[2] It is surrounded by two equivalents of the conjugate base (dmgH⁻) of dimethylglyoxime (dmgH₂). The pair of organic ligands are joined through hydrogen bonds to give a macrocyclic ligand. The complex is distinctively colored and insoluble leading to its use as a chelating agent in the gravimetric analysis of nickel.

Starting with the mass of Ni(DMG) 2 (that is the red precipitate), show the calculation to obtain the moles of Ni 2+ that is present in your Ni-en complex you analyzed. Be sure to include any appropriate chemical reactions that were used in the calculation. Ni(dmgH)2 Figure. Structure of Ni(dmgH)2.As an analytical reagent, dmgH2 is often used as a solution in ethanol. It is the conjugate base, not dmgH2 itself, that forms the complexes. Furthermore, a pair of dmgH- ligands are joined through hydrogen bonds to give a macrocyclic ligand. CID 83518 C8H14N4NiO4 CID 83518 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety. The Gravimetric Estimation of Nickel: The nickel is precipitated as nickel dimethyl glyoxime by adding alcoholic solution of dimethyl glyoxime C 4 H 6 (NOH) 2 and then adding a slight excess of aqueous ammonia solution. When the pH is buffered in the range of 5 to 9, the formation of the red chelate occurs quantitatively in a solution.

The use of dimethylglyoxime as a reagent to detect nickel was reported by L. A. Chugaev in 1905.^[3]

Nickel Dimethylglyoxime

References[edit]

Ni Dmg 2 Molar Mass

^Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN978-0-08-037941-8.
^Donald E. Williams, Gabriele Wohlauer, R. E. Rundle (1959). 'Crystal Structures of Nickel and Palladium Dimethylglyoximes'. J. Am. Chem. Soc. 81: 755–756. doi:10.1021/ja01512a066.CS1 maint: uses authors parameter (link)
^Lev Tschugaeff (1905). 'Über ein neues, empfindliches Reagens auf Nickel'. Berichte der deutschen chemischen Gesellschaft. 38 (3): 2520–2522. doi:10.1002/cber.19050380317.

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