153735-01-4

Basic information

• Product Name: [((C₆H₅)3P)2N]⁽¹⁺⁾*[IrI₂(CO)2]^(1-)=[((C₆H₅)3P)2N][IrI₂(CO)2]
• CAS NO: 153735-01-4
• Molecular Weight: 1040.64
• Mol File: 153735-01-4.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: [((C₆H₅)3P)2N]⁽¹⁺⁾*[IrI₂(CO)2]^(1-)=[((C₆H₅)3P)2N][IrI₂(CO)2](CAS DataBase Reference)
• NIST Chemistry Reference: [((C₆H₅)3P)2N]⁽¹⁺⁾*[IrI₂(CO)2]^(1-)=[((C₆H₅)3P)2N][IrI₂(CO)2](153735-01-4)
• EPA Substance Registry System: [((C₆H₅)3P)2N]⁽¹⁺⁾*[IrI₂(CO)2]^(1-)=[((C₆H₅)3P)2N][IrI₂(CO)2](153735-01-4)

Safety Data

• Hazardous Substances Data: 153735-01-4(Hazardous Substances Data)

Upstream product

• 201230-82-2 carbon monoxide 
• 21050-13-5 bis(triphenylphosphine)iminium chloride 
• 7790-41-2 iridium(III) iodide 
• 7790-45-6 iridium(IV) iodide 
• 68-12-2 N,N-dimethyl-formamide 

Downstream Products

• 602298-02-2 [bis(triphenylphosphoranylidene)ammonium][IrI₃(CH₃)(CO)2] 
• 917703-63-0 [bis(triphenylphosphoranylidene)ammonium][IrI₄(CO)2] 
• 602298-01-1 [PPN][IrHI₃(CO)2] 

Relevant articles and documents

Promoting role of [PtI2(CO)]2 in the iridium-catalyzed methanol carbonylation to acetic acid and its interaction with involved iridium species

The catalytic activity of the iridium complexes involved in methanol carbonylation is significantly enhanced when the carbonyliodoplatinum dimer [PtI2(CO)]2 (10′) is added to the reaction mixture. Under CO this complex readily affords the monomeric species [PtI 2(CO)2] (10). The turnover frequency value, which is 1450 h-1 for iridium alone, reaches 2400 h-1 for a Pt/Ir = 3/7 molar ratio, under 30 bar of CO and at 190 °C. To get a deeper insight into the role of the platinum cocatalyst, model conditions (dinitrogen, ambient temperature, CH2Cl2, PPN+ as counterion) have been adopted. [PtI2(CO)]2 (10′ interacts with [PPN][IrI3(CH3)(CO)2] (4-PPN), affording the monoiodo-bridged anionic species [IrI2(CH3)(CO) 2(μ-I)-PtI2(CO)]- (11), which undergoes cleavage under CO to provide [IrI2(CH3)(CO)3] (6) and PtI3(CO)]- (9). Although we have to take into account the possible iodide dissociation from 4 in the polar reaction medium (CH3COOH, CH3OH, CH3I, HI, H2O), which can be scavenged by platinum to give 9, we should not discard the intermediacy of 11, even under working catalytic conditions. The crystal structures of [PPN][IrI3(COCH3)(CO)2] (8-PPN) and [PPN][PtI3(CO)] (9-PPN), which are both involved in the overall process, were determined by X-ray diffraction analysis. A catalytic cycle is herein proposed, in which the cooperative effect between the platinum promoter and the iridium catalyst is depicted.