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JEE Main levelSingle correct optionDifficulty 2 of 3qc080

In the red complex $Ni (DMG) X_{2}$ , which statement is correct?

ANi is bonded to four nitrogen atoms in a square planar arrangement, with two intramolecular O--H $\dots$ O hydrogen bonds
BNi is bonded to four nitrogen atoms in a tetrahedral arrangement with no hydrogen bonds
CNi is bonded to six atoms in an octahedral arrangement
DNi is bonded to four oxygen atoms in a tetrahedral arrangement

Answer: A

Each dimethylglyoximate ion binds through two nitrogen atoms. The two ligands lie in one plane around

Ni X^{2 +}

(

d^{8}

, square planar), and the two cyclic O--H

\dots

O hydrogen bonds between them stabilise the neutral red chelate.

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