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Chemistry LibreTexts

Cis & Trans Stereochemistry in Octahedra

Earlier we looked at cis- and trans-isomers in square planar platinum complexes.  Other transition metal complexes display cis-trans isomerism. Octahedral complexes can also have two particular ligands adjacent to each other or on opposite sides of the metal atom. For example, the cation [(NH3)4CoCl2]+ has a cis-isomer and a trans-isomer.

 

Figure SC17Cis and trans-isomers of an octahedral cobalt compound.