Co-Ordination Compounds Question 239
Question: Which of the following complex compound (s) is/are paramagnetic and low spin?
(I) $ K_3[ Fe( CN_6 ) ] $
(II) $ {{[ Ni{{( CO )}_4} ]}^{10}} $
(III) $ {{[ Cr{{(NH_3)}_6} ]}^{3+}} $
(IV) $ {{[ Mn,(CN_6) ]}^{4,-}} $
Choose the correct code:
Options:
A) I only
B) II and III
C) I and IV
D) IV only
Show Answer
Answer:
Correct Answer: C
Solution:
$ F{e^{3+}},in,{{[ Fe(CN_6) ]}^{3-}} $
$ \Rightarrow $ low spin complex $ \mu =1.732BM $ Ni in $ [ Ni{{( CO )}_4} ] $
$ C{r^{3+}},in{{[Cr{{( NH_3 )}_6}]}^{3+}} $
$ \Rightarrow $ low and high spin complex is applicable for $ d^{4} $ to $ d^{7} $ configuration $ M{n^{2+}}in{{[ Mn{{( CN )}_6} ]}^{4-}} $
$ \Rightarrow $ low spin complex $ \mu =1.732,BM $
