How does Werner's coordination theory apply to modern chemistry?
My coordination theory is the bedrock of modern inorganic chemistry, catalysis, and materials science. Today, every chemist uses coordination numbers and geometries to design catalysts—for example, the Wilkinson catalyst for hydrogenation is a square-planar rhodium complex, and Ziegler-Natta catalysts for polymerizing ethylene rely on octahedral titanium centers. In bioinorganic chemistry, the active sites of enzymes like hemoglobin contain iron in an octahedral coordination sphere; my theory explains how oxygen binds reversibly. In supramolecular chemistry, metal-organic frameworks (MOFs) are built by linking metal ions with organic ligands—a direct application of my secondary valence concept. Even in medicine, platinum-based anticancer drugs like cisplatin are square-planar complexes whose geometry determines their biological activity. The key lies in the arrangement, not just the constituents. My octahedron and tetrahedron remain nature's favorite shapes for coordination, guiding discovery from the lab to the clinic.
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