Co-Ordination Compounds Question 252
Question: Consider the following complex $ [ Co{{( NH_3 )}_5}CO_3 ]ClO_4 $ The coordination number, oxidation number, number of d-electrons and number of unpaired d-electrons on the metal are respectively
Options:
A) 6,3,6,0
B) 7,2,7,1
C) 7,1,6,4
D) 6,2,7,3
Show Answer
Answer:
Correct Answer: A
Solution:
$ [ Co{{( NH_3 )}_5}CO_3 ]ClO_4 $ .
Six monodentate ligands are attached to Co hence C.N.of Co=6; $ O.N.=x+5\times ( 0 )+1\times ( -2 )+1\times ( -1 )=0, $
$ \therefore x=+3; $ electronic configuration of $ C{o^{3+}}[Ar]3d^{6}4s^{0} $ hence number of d electrons is 6.
All d electrons are paired due to strong ligand hence unpaired electron is zero.
