Question

 

Consider the complex : K3[Co(C2O4)2Cl2

The coordination number, the oxidation number of Co and the number of unpaired electrons on the metal are respectively

Solution

Correct option is

6, +3, 4

 

 is bidentate and Cl is monodentate ligand.

Hence, C.N. = 2 × 2 + 2 × 1 = 6 

       

Both  and Cl are weak field ligands and hence form outer (high spin) complex. 

     Co(III) : 3d6 (n = 4)  

SIMILAR QUESTIONS

Q1

On treatment of [Ni(NH3)4]2+ with concentrated HCl, two compounds I and II having the same formula, Ni(NH3)2Cl2 are obtained. I can be converted into II by boiling with dilute HCl. A solution of I reacts with oxalic acid to form [Ni(NH3)2(C2O4) whereas II does not react. Point out the correct statement of the following

Q2

The aqueous 0.01 m of [Co(NH3/6][Co(NH3)(NO2)5]3 is expected to have the depression of freezing point (Kf for water = 1.86 K/m)

Q3

Ethylenediaminetetraacetic acid (EDTA) is the antidote for lead poisoning. It is administered in the form of 

Q4

 

Which of the following ions are expected to be paramagnetic to the same extent? 

I. [FeF6]3–                              II. [MnCl4]2–

III. [NiCl4]2–     

Q5

Which of the following is an outer orbital complex?

Q6

The most stable ions is

Q7

Which of the following has the largest number of isomers?

Q8

The number of geometric isomer of the complex Cr(NH3)3Cl3 is

Q9

A coordination complex having which one of the following descriptions would be paramagnetic to the maximum extent?

Q10

Pick out the paramagnetic species of the following