Concept

Tricyclohexylphosphine

Tricyclohexylphosphine is the tertiary phosphine with the formula P(C6H11)3. Commonly used as a ligand in organometallic chemistry, it is often abbreviated to PCy3, where Cy stands for cyclohexyl. It is characterized by both high basicity (pKa = 9.7) and a large ligand cone angle (170°). Important complexes containing P(Cy)3 ligands include the 2005 Nobel Prize-winning Grubbs' catalyst and the homogeneous hydrogenation catalyst Crabtree's catalyst. Image:Grubbs_Catalyst_1st_Generation.svg|Grubbs' catalyst (first generation) Image:Crabtree.

Official source

https://en.wikipedia.org/wiki/Tricyclohexylphosphine

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