259881-42-0

Basic information

• Product Name: [Hf(C₅H₅)3(CO)]⁽¹⁺⁾*[B(C₆H₅)4]^(1-)=[Hf(C₅H₅)3(CO)][B(C₆H₅)4]
• CAS NO: 259881-42-0
• Molecular Weight: 721.018
• Mol File: 259881-42-0.mol

Chemical Properties

• CAS DataBase Reference: [Hf(C₅H₅)3(CO)]⁽¹⁺⁾*[B(C₆H₅)4]^(1-)=[Hf(C₅H₅)3(CO)][B(C₆H₅)4](CAS DataBase Reference)
• NIST Chemistry Reference: [Hf(C₅H₅)3(CO)]⁽¹⁺⁾*[B(C₆H₅)4]^(1-)=[Hf(C₅H₅)3(CO)][B(C₆H₅)4](259881-42-0)
• EPA Substance Registry System: [Hf(C₅H₅)3(CO)]⁽¹⁺⁾*[B(C₆H₅)4]^(1-)=[Hf(C₅H₅)3(CO)][B(C₆H₅)4](259881-42-0)

Safety Data

• Hazardous Substances Data: 259881-42-0(Hazardous Substances Data)

Upstream product

• 201230-82-2 carbon monoxide 
• 64167-39-1 tri(n-butyl)ammonium tetraphenylborate 

Relevant articles and documents

Carbon monoxide and tertiary phosphines as ligands in cyclopentadienyl derivatives of Group 4 elements in high oxidation state

The titanocene dicarbonyl dication [TiCp2(CO)2][BPh4]2, (1) has been obtained in toluene under carbon monoxide by double protonation of TiCp4 with [NHnBu3][BPh4] or by two-electron oxidation of TiCp2(CO)2 with [FeCp2][BPh4]. Protonation reactions on ZrCp4 and HfCp4 proceed with elimination of 1 mol of cyclopentadiene independently on the ammonium salt/MCp4 molar ratio used. By this route the high electrophilic, solvent-free [ZrCp3]+ cation has been isolated and characterized by IR, 1H-NMR and elemental analysis. In the case of hafnium, the isolation has not been possible; nevertheless, in the presence of CO a rare example of a carbonyl derivative of hafnium(IV), [HfCp3(CO)][BPh4], has been isolated and characterized.