Which complex has ligands arranged in a meridional configuration as one of its geometrical isomers?
[Co(NH₃)3Cl₃] (octahedral, [Ma₃b3]) can have a meridional (mer) isomer where 3 Cl− ligands are in a plane.
Ref: NCERT Class 12 Chemistry > Chapter 5: Coordination Compounds > Topic: Isomerism - Geometrical Isomerism in Coordination Compounds