Question

Which of the following compounds has enantiomers?

(a) K3[Fe(CN)6]

(b) K3[Al(C2O4)3]

(c) K2[Zn(OH)4]

(d) K2[PdCl4]

I have been asked this question by my college director while I was bunking the class.

My enquiry is from Isomerism in Coordination Compounds in section Coordination Compounds of Chemistry – Class 12

Answer 1

Right option is (b) K3[Al(C2O4)3]

To explain: K3[Fe(CN)6], K2[Zn(OH)4] and K2[PdCl4] are compounds with unidentate ligands and CN of 6 (octahedral), 4 and 4 respectively. Whereas, K3[Al(C2O4)3] is an octahedral compound with a didentate ligand oxalate and shows optical isomerism.