JEE PYQ: Coordination Compounds Question 13
Question 13 - 2020 (02 Sep Shift 1)
Consider that a $d^6$ metal ion ($\text{M}^{2+}$) forms a complex with aqua ligands, and the spin only magnetic moment of the complex is 4.90 BM. The geometry and the crystal field stabilization energy of the complex is:
(a) octahedral and $-2.4\Delta_0 + 2P$ (b) tetrahedral and $-0.6\Delta_t$ (c) octahedral and $-1.6\Delta_0$ (d) tetrahedral and $-1.6\Delta_t + 1P$
Show Answer
Answer: (b)
Solution
$\mu = 4.9$ BM gives $n = 4$ unpaired electrons. For tetrahedral: CFSE $= -0.6\Delta_t$.