9.9 How many geometrical isomers are possible in the following coordination entities?
(i) [Cr(C2O4)3]3– (ii) [Co(NH3)3Cl3]
Step 1:
In disubstituted complexes, the substituted groups may be adjacent or opposite to each other. This gives rise to geometric isomerism. It form two isomers cis and trans.
(i) For [Cr(C2O4)3]3–, no geometric isomer is possible as it is a bidentate ligand.
(ii) [Co(NH3)3Cl3]
Two geometrical isomers are possible. The structures are as follows:
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