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Question

Chemistry Question on coordination compounds

Which complex compound is most stable?

A

[Co(NH3)6]2(SO4)3[\text{Co(NH}_3\text{)}_6]_2(\text{SO}_4)_3

B

[Co(NH3)4(H2O)Br](NO3)2[\text{Co(NH}_3\text{)}_4 (\text{H}_2\text{O)Br}] (\text{NO}_3)_2

C

[Co(NH3)3(NO3)3][\text{Co(NH}_3\text{)}_3 (\text{NO}_3)_3]

D

[CoCl2(en)2]NO3[\text{CoCl}_2(\text{en})_2] \text{NO}_3

Answer

[CoCl2(en)2]NO3[\text{CoCl}_2(\text{en})_2] \text{NO}_3

Explanation

Solution

The accurate choice is (D) [CoCl2(en)2]NO3[\text{CoCl}_2(\text{en})_2] \text{NO}_3, attributed to the chelation effect of (en).