14970-07-1

Basic information

• Product Name: Iridium, carbonyliodobis(triphenylphosphine)-
• CAS NO: 14970-07-1
• Molecular Formula: C37H30IIrOP2
• Molecular Weight: 871.717
• Mol File: 14970-07-1.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: Iridium, carbonyliodobis(triphenylphosphine)-(CAS DataBase Reference)
• NIST Chemistry Reference: Iridium, carbonyliodobis(triphenylphosphine)-(14970-07-1)
• EPA Substance Registry System: Iridium, carbonyliodobis(triphenylphosphine)-(14970-07-1)

Safety Data

• Hazardous Substances Data: 14970-07-1(Hazardous Substances Data)

Upstream product

• 52594-52-2 dimethyl(2,2'-bipyridine)platinum(II) 
• 59246-46-7 bis(triphenylphosphine)carbonyliridium(I) chloride 
• 16029-98-4 trimethylsilyl iodide 
• 7681-82-5 sodium iodide 

Downstream Products

• 15318-31-7 bis(triphenylphosphine)iridium(I) carbonyl chloride 
• 14970-06-0 Ir(CO)Br(Ph₃P)2 
• 63685-89-2 [Ir(CO)I(NNC₆H₃Br-m)(PPh₃)2] 
• 63686-39-5 [Ir(CO)I(NH:NC₆H₃Br-o)(PPh₃)2]BF₄ 
• 26545-09-5 Ir(CO)HClI(P(C₆H₅)3)2 

Relevant articles and documents

Reactivity patterns and catalytic chemistry of iridium polyhydride complexes

(1, P=PPri3) reacts autocatalytically with CF3COOR (R=CH2CF3) in cyclo-C6D12 at 60 deg C according to: 1 + CF3COOR -> (2) + ROH (4) (eq.1).The rate-law, -d/dt=k1/21/2-1/2 (k=1.25*10-4 M-1/2 sec-1), is consistent with the mechanism, 1 + 2 2 (5) + 4 (rapid equilibrium); 5 + CF3COOR -> > (6) (rate determining); 6 -> 2 + CF3CHO; 5 + CF3CHO -> 2. 2 reacts rapidly with H2 (25 deg C, 1 atm) according to: 2 + 2H2 -> 1 + 4 (eq.2).Although the combination of reactions 1 and 2 constitute a catalytic cycle for the hydrogenation of CF3COOR (CF3COOR + 2H2 -> 2 (4), catalyzed by 1), such catalytic hydrogenation does not occur, presumably because H2 suppresses reaction by rapidly converting the catalytic intermediates, 2 and 5, to 1.However, 1 was found to be effective as a catalyst or catalyst precursor for transfer hydrogenation, e.g.CH2=CHC(CH3)3 + (CH3)2CHOH -> CH3CH2C(CH3)3 + (CH3)2C=O.While not directly detected, IrH3P2 could be trapped at low temperatures by N2 to yield the complexes and which are related through the labile equilibrium, + N2 2 (Keq ca. 1.5 at 35 deg C).

Alkyl halide transfer from palladium(IV) to platinum(II) and a study of reactivity, selectivity, and mechanism in this and related reactions

Kinetic studies of the oxidative addition of MeI or PhCH2Br to [MMe2(L2)] (M = Pd or Pt, L2 = 2,2′-bipyridine or 1,10-phenanthroline) indicate that the reactions occur by the SN2 mechanism, and the reactions occur 7-22 times faster when M = Pt over Pd and 1.2-2.2 times faster when L2 = phen over bpy. Reductive elimination from [PdBrMe2(CH2Ph)(L2)] in the solid state occurs to give both Me-Me and PhCH2Me, and there is a preference for methyl group loss. Thermochemical studies indicate that CH3-CH3 loss gives ΔH = -108 ± 4 kJ mol-1 but PhCH2-CH3 loss gives ΔH = -48 ± 12 kJ mol-1, indicating a relatively strong PhCH2-Pd bond. The complexes [PdIMe3(L2)] or [PdBrMe2(CH2Ph)(L2)] react rapidly with [PtMe2(L2)] by alkyl halide transfer. Kinetic studies have shown that the major route involves loss of halide from palladium(IV) in a preequilibrium step, followed by SN2 attack by [PtMe2(L2)] on an alkyl group of [PdMe3(L2)]+ or [PdMe2(CH2Ph)(L2)]+. In the latter case, benzyl group transfer is preferred over methyl group transfer.