What is/are the coordination number(s) of Au in the complexes formed by Au? — Coordination Compounds Chemistry Question

💡 Solution & Explanation

Step 1: Platinum(II) complexes with a coordination number of 4 are square planar (dsp^2 hybridized) and are diamagnetic (low-spin d^8). This rules out (b), (c), and (d). Step 2: The complex has the general formula [MA2BC] with two chloride ligands, one water molecule, and one ammonia molecule in a square planar arrangement. Step 3: This arrangement allows for cis and trans geometrical isomers, making option (a) true.