AllChemicals — The Online Chemical Glossary | https://allchemicals.info/chemical/480-homogeneous-catalyst
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Quick Reference
Also Known As
Solution catalyst, dissolved catalyst, homogeneous catalyst system
What is Homogeneous Catalyst?
A catalyst that is in the same phase as the reactants, typically in solution. Homogeneous catalysts offer better contact with reactants but are harder to separate. Examples include acid catalysis in esterification and enzymatic catalysis in biological systems.
Properties & Characteristics
A homogeneous catalyst is a catalyst in the same phase as the reactants, most commonly dissolved in the same liquid phase. Homogeneous catalysts offer better mixing and easier access to all reaction sites compared to heterogeneous catalysts. They allow structural tuning of the active site via ligand design (particularly in organometallic catalysis). However, they can be difficult to separate from the product.
Uses & Applications
Homogeneous catalysts include: H⁺ for acid-catalysed reactions (esterification, hydrolysis), Wilkinson's catalyst [RhCl(PPh₃)₃] for alkene hydrogenation, Ziegler-Natta organometallic catalysts for polymerisation, palladium complexes in cross-coupling (Suzuki, Heck, Negishi), and enzymes in biochemistry.
Safety Information
Organometallic homogeneous catalysts often contain toxic or precious metals (Rh, Pd, Pt, Ru, Os). Ligands such as phosphines (PPh₃) are toxic and air-sensitive. Cyanide-containing catalysts generate HCN on hydrolysis. Proper inert atmosphere techniques, ventilation, and waste disposal are required.
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
SynonymsSolution catalyst, dissolved catalyst, homogeneous catalyst system
Frequently Asked Questions
A catalyst that is in the same phase as the reactants, typically in solution. Homogeneous catalysts offer better contact with reactants but are harder to separate. Examples include acid catalysis in esterification and enzymatic catalysis in biological systems.
Homogeneous catalysts include: H⁺ for acid-catalysed reactions (esterification, hydrolysis), Wilkinson's catalyst [RhCl(PPh₃)₃] for alkene hydrogenation, Ziegler-Natta organometallic catalysts for polymerisation, palladium complexes in cross-coupling (Suzuki, Heck, Negishi), and enzymes in biochemis…
Organometallic homogeneous catalysts often contain toxic or precious metals (Rh, Pd, Pt, Ru, Os). Ligands such as phosphines (PPh₃) are toxic and air-sensitive. Cyanide-containing catalysts generate HCN on hydrolysis. Proper inert atmosphere techniques, ventilation, and waste disposal are required.
Editorial standards: Chemical data is sourced from peer-reviewed literature,
CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA,
and IAEA. For educational purposes only — always consult official SDS documentation and qualified
professionals before handling chemicals.
