Coordination Compounds 2 Question 21

####23. The highest value of the calculated spin only magnetic moment (in $BM$ ) among all the transition metal complexes is

(2019 Main, 9 Jan I)

(a) 5.92

(b) 3.87

(c) 6.93

(d) 4.90

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Answer:

Correct Answer: 23. (b)

Solution:

  1. The spin only magnetic moment ( $\mu$ ) (in $BM$ ) is given by

$$ \mu(\text { in } B M)=\sqrt{n(n+2)} $$

where, $n=$ number of unpaired electrons The highest value of $n$ in transition metal complex is 5 in its $d^{5}$-configuration.

$\therefore \quad \mu=\sqrt{5(5+2)} BM=5.916 BM$



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