191669-78-0

Basic information

• Product Name: (η(5)-C5H5)2Rh2(CO)(μ-η(1):η(1)-CF3C2CF3)(eta.(1)-Ph2PCCCF3)
• CAS NO: 191669-78-0
• Molecular Weight: 804.259
• Mol File: 191669-78-0.mol

Chemical Properties

• CAS DataBase Reference: (η(5)-C5H5)2Rh2(CO)(μ-η(1):η(1)-CF3C2CF3)(eta.(1)-Ph2PCCCF3)(CAS DataBase Reference)
• NIST Chemistry Reference: (η(5)-C5H5)2Rh2(CO)(μ-η(1):η(1)-CF3C2CF3)(eta.(1)-Ph2PCCCF3)(191669-78-0)
• EPA Substance Registry System: (η(5)-C5H5)2Rh2(CO)(μ-η(1):η(1)-CF3C2CF3)(eta.(1)-Ph2PCCCF3)(191669-78-0)

Safety Data

• Hazardous Substances Data: 191669-78-0(Hazardous Substances Data)

Upstream product

• 33730-49-3 PPh₂(CCCF₃) 

Relevant articles and documents

Phosphinoalkyne additions to (η5-C5H5)2Rh 2(μ-CO)(μ-η2:η2-CF 3C2CF3): Facile conversion of coordinated phosphinoalkynes to phosphino-enone ligands on a Rh-Rh bond

The phosphinoalkynes Ph2PC≡CR (R = H, Me, CF3, But, Ph, and PPh2) behave as tertiary phosphines in their reactions with the dirhodium complex (η5-C5H5)2Rh 2(μ-CO)(μ-η2:η2-CF 3C2-CF3) (1). All six addition products (η5-C5H5)2Rh 2(CO)(μ-η1:η1-CF3C 2CF3)(η1-Ph2PC≡CR) (4) have been isolated and fully characterized. The bis(diphenylphosphino)alkyne Ph2PC≡CPPh2 also forms a tetranuclear complex (5) in which each phosphorus coordinates to a dirhodium unit. With the exception of 4 when R = H, the solid complexes are relatively stable. However, when solutions of two of the complexes (R = Me, Ph) are left in the presence of both silica and oxygen, there is oxygen transfer to an alkyne carbon accompanied by an intramolecular condensation reaction to generate a phosphino-enone ligand. The structure of one of these oxidation products, (η5-C5H5)2Rh 2(μ-C(CF3)C(CF3)C{C(O)R}PPh2) (6, R = Ph), has been established by X-ray crystallography. Prior oxidation of the phosphinoalkynes to give Ph2P-(O)C≡CR and subsequent reaction with 1 leads to the formation of typical alkyne addition products.