How many geometrical isomers are possible in the following coordination entities?
(1). ${[C r {(C_{2} O_{4})}_{3}]}_{3}^{3 -}$

(2). $[C o {(N H_{3})}_{3} C l_{3}]$

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Solution

(1). ${[C r {(C_{2} O_{4})}_{3}]}_{3}^{3 -}$ : There is no geometric isomer is possible as it is a bidentate ligand.

(2). Two geometrical isomers, Facial and Meridional, are possible for $[C o {(N H_{3})}_{3} C l_{3}]$

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How many geometrical isomers are possible in the following coordination entities?

(i) [Cr(C₂O₄)₃]³⁻ (ii) [Co(NH₃)₃Cl₃]

[C o {({N H}_{3})}_{3} {C l}_{3}]

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[C o C l_{3} (N H_{3})_{3}]

[A l (C_{2} O_{4})_{3}]^{3 -}

_{3}

_{2}

_{2}

^{+}

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