Geometric Isomerism in Complexes
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Geometric isomers share the same ligands on the same metal but differ in arrangement: cis has like ligands adjacent, trans has them opposite.
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cis-[Co(NH3)4Cl2]+ has its two chlorides adjacent, while its trans isomer has them across the octahedron.
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Geometric isomers are different compounds with different properties, like color and polarity, not one compound drawn two ways.