Hi so I’m revising complex ions and have learnt that for an optical isomer to form they need to have 3 bidentate ligands or 2 bidentate ligands and 2 monodentate of the cis isomer. I was just wondering if all the bidentate ligands have to be the same or if they can be different. Same with the monodentate ligands do they have to be both the same ? As for all the examples I have seen they have been the same . Thank you