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Question

Chemistry Question on coordination compounds

Which of the following has the largest number of isomers?

A

[Ru(NH3)4Cl2]+[Ru(NH_3)_4Cl2]^+

B

[Co(en)2Cl2]+[Co(en)_2Cl_2]^+

C

(Ir(PR3)2H(CO)]2+(Ir(PR_3)_2H(CO)]^{2+}

D

[Co(NH3)5Cl]2+[Co(NH_3)_5Cl]^{2+}

Answer

[Co(en)2Cl2]+[Co(en)_2Cl_2]^+

Explanation

Solution

(a) [Ru(NH3)4Cl2]+(a)\, [Ru(NH_3)_4Cl_2]^+ has two isomers- cis and trans isomers.


(b) [Co(en)2Cl2]+(b)\, [Co(en)_2Cl_2]^+ shows both geometrical and optical isomerism.

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di-isomer is unsymmetrical, hence shows optical Isomerism. It has three isomers.

(c) [Ir(PR3)H(CO)]2+(c)\,[Ir(PR_3)H(CO)]^{2+} shows two geometrical isomers.


(d) [Co(NH3)5Cl]2+(d)\, [Co(NH_3)_5Cl]^{2+} does not show isomerism.