Rh2CO8

Rh2CO8 is the chemical formula for dirhodium octacarbonyl. This compound is an organometallic compound of rhodium. It is a dimeric complex featuring a rhodium-rhodium bond and eight carbonyl ligands. The structure typically consists of two rhodium atoms bridged by two carbonyl groups, with the remaining six carbonyl groups coordinated terminally to each rhodium atom. It is often described as having a square planar arrangement around each rhodium center.

Dirhodium octacarbonyl is a solid at room temperature, usually appearing as dark red or black crystals. It is soluble in many organic solvents. This compound is known for its reactivity, particularly in catalytic applications. It serves as a precursor for other rhodium catalysts, and it itself can catalyze various organic transformations, including carbonylation reactions and hydroformylation. The presence of the rhodium-rhodium bond is thought to play a significant role in its catalytic activity, allowing for facile oxidative addition and reductive elimination steps.

The synthesis of dirhodium octacarbonyl can be achieved through several methods, often involving the reaction of rhodium compounds with carbon monoxide under specific conditions. Due to its importance in catalysis, research continues into its synthesis, properties, and application in promoting chemical reactions. It is a key compound in the field of organometallic chemistry and homogeneous catalysis.