Co-Ordination Compounds Question 306
Question: The complex showing a spin-only magnetic moment of 2.82 B.M. is:
Options:
A) $ Ni{{( CO )}_4} $
B) $ {{[NiCl_4]}^{2-}} $
C) $ Ni{{( PPh_3 )}_4} $
D) $ {{[Ni{{(CN)}_4}]}^{2-}} $
Show Answer
Answer:
Correct Answer: B
Solution:
$ {{[ NiCl_4 ]}^{2-}},O.S.of,Ni=+2 $
$ Ni(28)=3d^{8}4s^{2} $
$ C{l^{-}} $ being weak ligand it cannot pair up the two electrons present in 3d orbital No.
of unpaired electrons = 2 Magnetic moment, $ \mu =2.82BM.$
