Square-planar [Pd(CN)₂Br₂]²⁻ permits each cyanide to bind through C or N. Ignoring ligand conformations, how many linkage-and-geometrical isomers exist?

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CC gives two Ma₂b₂ forms. NN gives two more. CN gives Ma₂bc, with the identical Br pair cis or trans, giving two. Total = 2+2+2 = 6. Interchanging identical ligand labels does not add an isomer.

Chemistry - Coordination Chemistry Question with Solution | TestHub

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