Overview
Dicarbonylrhodium(I) chloride dimer is an organorhodium compound pivotal in catalytic chemistry. It consists of two rhodium atoms bridged by chloride ligands, each bonded to two carbonyl groups. This complex is renowned for its role in facilitating carbon-carbon bond formation, making it indispensable in fine chemical and pharmaceutical manufacturing. First synthesized in the mid-20th century, it became a cornerstone in homogeneous catalysis due to its stability and reactivity under mild conditions. Its ability to activate small molecules (e.g., CO, H2) enables efficient large-scale industrial processes.
Physical and Chemical Properties
The compound appears as an orange-red crystalline solid, sensitive to air and moisture. It decomposes upon heating without a distinct melting point. Its solubility in polar organic solvents like dichloromethane allows easy integration into reaction systems. Key chemical behaviors include ligand exchange reactions and oxidative addition, which underpin its catalytic mechanisms. The rhodium center’s electron deficiency enhances its affinity for π-acceptor ligands (e.g., CO), stabilizing transition states during catalysis.
Main Applications
Primarily used in hydroformylation (oxo process), it converts alkenes to aldehydes with high regioselectivity. This is critical for producing plasticizers, detergents, and fragrances. In pharmaceuticals, it enables asymmetric hydrogenation to synthesize chiral intermediates. Other applications include methanol carbonylation for acetic acid production and cyclopropanation reactions. Its versatility has spurred research into renewable energy, such as CO2 reduction catalysis.
Safety and Storage
As a toxic and irritant compound, handling requires strict precautions: use nitrile gloves, goggles, and NIOSH-approved respirators. Storage mandates inert atmospheres (argon/nitrogen) at 2–8°C in amber glass vials to prevent degradation. Spills should be neutralized with inert absorbents and disposed of as hazardous waste. SDS guidelines must be followed for transport and emergency protocols due to potential Rhodium release.
B2B Procurement Guide
Buyers should prioritize suppliers offering certificates of analysis (COA) confirming purity (≥98%) and trace metal content. Bulk purchases (100g+) may attract discounts but require verification of batch consistency. Consider logistical factors: air-sensitive compounds need specialized packaging with cold packs for long-distance shipping. Establish supplier audits to ensure compliance with REACH or TSCA regulations.
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