Coordination Compounds Ques 48
48. Red precipitate is obtained when ethanol solution of dimethylglyoxime is added to ammoniacal $Ni(II)$. Which of the following statements is not true?
[2012 M]
(a) Red complex has a square planar geometry.
(b) Complex has symmetrical H-bonding
(c) Red complex has a tetrahedral geometry.
(d) Dimethylglyoxime functions as bidentate ligand.
Show Answer
Answer:
Correct Answer: 48.(c)
Solution:
(c) Nickel ions are frequently detected by the formation of red precipitate of the complex of nickel dimethylglyoxime, when heated with dimethylglyoxime.
Dimethylglyoxime
$dmg$ is s atrong field ligand, so electrons will rearrange as:
Thus, the complex is square plan ar geometry.
BETA
