Question

Select correct statement(s) regarding $\left[Ni\right(DMG{)}_2]$ complex compound

• A. It acts as oxidising agent because $N{i}^{2+}$ cation is having $EAN34$
• B. It is extra-stabilized by hydrogen bonding
• C. Its IUPAC name in bis(dimethylglyoximato)nickel(II)
• D. It's ligand contains two different donar site

Answer 1

Answer: (C)

Its IUPAC name in bis(dimethylglyoximato)nickel(II)

$EAN=Z-X+Y$
Z$=$Atomic number of the metal
X$=$Number of electrons lost during the formation of the metal ion from its atom
Y$=$Number of electrons donated by the ligands
$EAN=Z-X+Y$
$EAN=28-2+8=34$
To achieve EAN of 36, $\left[Ni\right(DMG{)}_2]$, needs two electrons.
However there are few exceptions from EAN rule. hence, $\left[Ni\right(DMG{)}_2]$ does not act as oxidizing agent. Thus option A is incorrect.
This complex has extra stability due to the formation of metal chelate. Thus option B is incorrect.
The IUPAC name of the compound $\left[Ni\right(DMG{)}_2]$ is $Bis\left(dimethylglyoximato\right)nickel\left(II\right)$.
The prefix Bis indicates two. The ligand is named as dimethylglyoximato.
The oxidation state is written in roman numerals in parenthesis.
Since the molecule is neutral, the name of the metal is written as nickel and not as nickelate. Thus option C is correct.
The ligand DMG is a bidentate ligand and not ambidentate ligand. Hence, it contains only one donor site which is oxygen atom. Thus option D is incorrect.