Coordination number
Coordination number
Real World
Cisplatin, the cancer drug developed by Barnett Rosenberg and used worldwide in chemotherapy, has a coordination number of 4 with Pt²⁺ bonded to two Cl⁻ and two NH₃ ligands in a square planar arrangement.
Exam Focus
Count the number of coordinate bonds, not the number of ligands — bidentate ligands like ethane-1,2-diamine form two bonds each.
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