Multiple choice How many isomers are possible for [Co (edta)]? 0 1 2 3 Reveal answer Fill a bubble to check yourself C Correct answer Explanation EDTA is a hexadentate ligand that wraps around the metal ion. In [Co(edta)]-, EDTA occupies all six coordination sites in octahedral geometry. This arrangement creates a chiral center, giving two enantiomers (optical isomers).