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The complex that can show fac- and mer- isomers is:

Option: 1

\left [ Co(NH_{3})_{3}(NO_{2})_{3} \right ]


Option: 2

\left [ Pt(NH_{3})_{2}Cl_{2} \right ]


Option: 3

\left [ CO(NH_{3})_{4}Cl_{2} \right ]^{+}


Option: 4

\left [ CoCl_{2}(en)_{2} \right ]


Answers (1)

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Complexes of the type [Ma_3b_3] exist in tw ogeometrical forms which are named as facial (fac-) and meridional (mer-).

The complex [Co(NH_3)_3(NO_2)_3]^+ can be represented in fac- and mer- isomeric forms as follows:

Therefore, Option(1) is correct.

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Rishabh

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