The IUPAC name of the complex `Ni[C_(4)H_(7)O_(2)N_(2)]` formed by the reaction between `Ni^(2+)` and dimethylglyoxime is

Options

A. bis (dimethylglyoxime) nikel
B. bis (methylglyoxime) nickel (II)
C. bis (2,3- butanedionedioximoto) nickel (II)
D. bis (2,3- butanedioldioximato) nivkel (II)

Answer

D

Explanation

A well known square planar nickel complex is nickel dimethylglyoximate, which precipitates as a red solid when dimethylglyoximate, which precipitates as a red solid when dimethylglyoxime is added to a solution of Ni salt made just alkaline by the addition of `NH_(3)` , the formation of the latter complex is used as test for `Ni^(2+)` ion. Dimethylglyoxime has the following structure:
`underset("2,3-butandioldioxime")(CH_(3)-overset(OH)overset(|)overset( :N)overset("||")(C)-overset(OH)overset(|)overset(N: )overset("||")(C)-CH_(3))`
If Dimethylglyoxime is respresented as DMG, the equatio for its formation can be represented as:
`2DMG + Ni^(2+) (aq) + 2OH^(-) (aq) rarr Ni(DMG)_(2) (s) + 2H_(2)O (1)`
During the reaction two protons (one form each dimethyglyoxime molecule) are neutralised by the ammonia solution. The complex (which is thus uncharged) is held in the planer configuration by two hydrogen bonds (shown by dotted lines)