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The complex, [ Cu (H_2O)_6 ] ^{2+}  has d^9 electronic configuration and has one unpaired electron, which of the following statements are true? 

1 ) The complex is octahedral 

2) It is outer sphere complex 

3) It is diamagnetic 

4) Coordination number of this compound is 6 

Option: 1

1,2,3,4 


Option: 2

1,2,3


Option: 3

2,3 


Option: 4

1,2,4 


Answers (1)

best_answer

As we have learned

Metallic character of transition elements -

Transition elements have relatively low ionisation energies and have one or two electrons in their outer most energy level (ns1 or ns2).As a result, metallic bonds are formed.The unpaired d- electron also result in the formation of the metallic bond. 

-

 

Since there are 6 H2O molecules attached as the ligand, thus its coordination number is 6 and its geometry is octahedral but since it has 1 unpaired electron thus the complex is paramagnetic.

Therefore, Option(4) is correct,

 

Posted by

Shailly goel

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