1071224-69-5

Basic information

• Product Name: [Mn(cyclopentadienyl)(CO)(OCC(Ph)PPh₂)]
• Synonyms: [Mn(cyclopentadienyl)(CO)(OCC(Ph)PPh₂)]
• CAS NO: 1071224-69-5
• Molecular Weight: 450.355
• Mol File: 1071224-69-5.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: [Mn(cyclopentadienyl)(CO)(OCC(Ph)PPh₂)](CAS DataBase Reference)
• NIST Chemistry Reference: [Mn(cyclopentadienyl)(CO)(OCC(Ph)PPh₂)](1071224-69-5)
• EPA Substance Registry System: [Mn(cyclopentadienyl)(CO)(OCC(Ph)PPh₂)](1071224-69-5)

Safety Data

• Hazardous Substances Data: 1071224-69-5(Hazardous Substances Data)

Upstream product

• 829-85-6 diphenylphosphane 

Relevant articles and documents

Umpolung of methylenephosphonium ions in their manganese half-sandwich complexes and application to the synthesis of chiral phosphorus-containing ligand scaffolds

Half-sandwich manganese methylenephosphonium complexes [Cp(CO)2Mn(η2-R2PC(H)Ph)]BF4 were obtained in high yield through a straightforward reaction sequence involving a classical Fischer-type manganese complex and a secondary phosphine as key starting materials. The addition of various nucleophiles (Nu) to these species took place regioselectively at the double-bonded carbon center of the coordinated methylenephosphonium ligand R2P+C(H)Ph to produce the corresponding chiral phosphine complexes [Cp(CO)2Mn(κ1-R2PC(H)(Ph)Nu)], from which the phosphines were ultimately recovered as free entities upon simple irradiation with visible light. The synthetic potential of this umpolung approach is illustrated herein by the preparation of novel chiral pincer-type phosphine-NHC-phosphine ligand architectures. Reactivity trend reversal: Methylenephosphonium salts coordinated to a manganese center were found to exhibit "iminium-like" reactivity towards nucleophiles (see scheme). This unprecedented umpolung enables the instant formation of carbon-heteroatom bonds, highlighted by the synthesis of novel chiral pincer-type phosphine-NHC-phosphine ligands.

Generation of α-phosphinocarbene complexes and their evolution: New light on relevant isomerization pathways

The η1-α-phosphinocarbene complex Cp(CO) 2Mn= CR(PHMes) (R = Ph, Me) is generated by nucleophilic attack of MesPH2 at the electrophilic center of the cationic Mn-carbyne complex [Cp(CO)2Mn≡CR]+, followed by deprotonation. One of its identified isomerization pathways to η1-phosphaalkene derivatives is shown to be both base-catalyzed and stereoselective, and to involve a transient phosphidocarbene species engaged in an acid-catalyzed migratory CO-insertion step.