Rhodium(II) Acetate Dimer

Updated: 2026-08-11

Overview

Dirhodium Tetraacetate (Rh₂(O₂CCH₃)₄) is a prominent rhodium-based catalyst widely employed in organic synthesis. Its dimeric structure and unique electronic properties make it highly effective for carbene transfer reactions, including cyclopropanation and C-H functionalization. The compound is particularly valued in pharmaceutical and fine chemical industries for its ability to facilitate complex transformations under mild conditions. Discovered in the mid-20th century, Dirhodium Tetraacetate has since become a cornerstone in catalytic chemistry. Its applications span academic research and industrial-scale processes, often replacing traditional heavy metal catalysts due to its efficiency and selectivity.

Physical and Chemical Properties

Dirhodium Tetraacetate appears as a green crystalline powder with limited solubility in water but good solubility in polar organic solvents like dichloromethane and methanol. It is sensitive to air and moisture, requiring storage under inert conditions to prevent decomposition. The compound decomposes above 200°C without melting, making it stable under typical reaction conditions. The Rh-Rh bond in the dimer is a key feature, enabling the formation of reactive rhodium-carbene intermediates. These intermediates are central to its catalytic activity, allowing for precise control over reaction pathways. The compound’s stability in organic solvents and compatibility with various functional groups further enhance its utility.

Main Applications

Dirhodium Tetraacetate is primarily used as a catalyst in organic synthesis, particularly for cyclopropanation reactions, where it enables the formation of three-membered carbon rings with high stereoselectivity. It is also employed in C-H insertion reactions, offering a route to functionalize inert C-H bonds in complex molecules. These transformations are critical in the synthesis of pharmaceuticals, agrochemicals, and specialty chemicals. Beyond carbene chemistry, the compound finds use in asymmetric synthesis, where chiral ligands can be introduced to achieve enantioselective outcomes. Its versatility and efficiency have made it a preferred choice for researchers and manufacturers aiming to streamline synthetic routes and reduce waste.

Safety and Storage

Due to its air- and moisture-sensitive nature, Dirhodium Tetraacetate must be handled under inert atmospheres (e.g., nitrogen or argon) to prevent degradation. Proper personal protective equipment (PPE), including gloves and safety goggles, is essential to avoid skin and eye contact. Inhalation of dust should be minimized by working in a fume hood. Storage conditions should prioritize dryness and inertness, with sealed containers placed in cool, dark environments. Long-term stability can be ensured by periodic checks for discoloration or clumping, which may indicate decomposition. Disposal must comply with local regulations for heavy metal-containing compounds.

B2B Procurement Guide

When procuring Dirhodium Tetraacetate, B2B buyers should prioritize suppliers who provide detailed Certificates of Analysis (COA), including purity, moisture content, and residual solvent levels. Bulk purchases may benefit from negotiated pricing, but quality should not be compromised for cost savings. Reliable suppliers often offer technical support for catalytic applications. Lead times can vary due to the compound’s specialized nature, so advance planning is advisable. Buyers should also inquire about packaging options, such as amber glass vials or Schlenk flasks, to ensure product integrity during transit. For large-scale industrial use, consider suppliers with a track record in rhodium chemistry.