39732-63-3

Upstream product

• 59246-46-7 bis(triphenylphosphine)carbonyliridium(I) chloride 
• 829-85-6 diphenylphosphane 
• 85185-80-4 FeIrHCl(μ-PPh2)(CO)4(PPh3)2 
• 33541-67-2 carbonylhydridotris(triphenylphosphine)iridium(I) 
• 18660-46-3 [Ir(H)₃(triphenylphosphine)₃] 
• 81987-87-3 FeIrP(C₆H₅)2(P(C₆H₅)3)2(CO)6 
• 82135-58-8 FeIrP(C₆H₅)2(P(C₆H₅)3)2(CO)4 
• 81987-86-2 FeIrP(C₆H₅)2(P(C₆H₅)3)2(CO)5 

Relevant academic research and scientific papers

Heterobimetallic phosphido-bridged complexes containing coordinatively unsaturated rhodium(I) and iridium(I) centers. Structural characterization of FeIr(μ-PPh2)(CO)5(PPh3)2

The series of new phosphido-bridged heterometallic binuclear complexes FeM(μ-PPh2)(CO)x(L)2 (M = Rh, L = PEt3, x = 4, 5; M = Ir, L = PPh3, x = 4-6) have been synthesized by the reaction of Li[Fe-(CO)4(PPh2)] with the appropriate irans-MCl(CO)L2 complex. The new complexes have been characterized spectroscopically, and FeIr(μ-PPh2)(CO)5(PPh3)2 has been characterized by a complete single-crystal X-ray diffraction study. It crystallizes in the space group P1 with a = 11.681 (3) A?, b = 20.869 (4) A?, c = 10.649 (9) A?, α = 96.74 (3)°, β = 108.86 (3)°, γ = 76.51 (2)°, V = 2386 (3) A?3, and Z = 2. Diffraction data (0° ≤ 2θ ≤ 50°) were collected with an Enraf-Nonius CAD4 automated diffractometer, using graphite-monochromatized Mo Kα radiation, and the structure was refined to R = 0.053 and Rw = 0.077 for 6257 independent reflections with I ≥ 3.0σ(I). The μ-PPh2 ligand bridges the Fe and Ir atoms, and each metal is ligated by a PPh3 ligand. The Fe is further ligated by three CO's and the Ir by two. The relatively long Fe-Ir bond length of 2.960 (1) A? suggests a weak donor-acceptor type interaction between the two metal centers. Each of the new compounds undergoes a series of reversible addition/elimination reactions with CO, and the Fe-Ir compounds react with H2 to give new H2 adducts.

Diphenylphosphido-bridged dirhodium complexes containing combinations of 1,5-cyclooctadiene, chelating diphosphines, and monodentate phosphine ligands

The syntheses, characterization, and phosphorus-31 NMR spectra of 17 new diphenylphosphido-bridged dirhodium complexes of bidentate and monodentate phosphines are presented. Treatment of [RhCl(COD)]2 and [IrCl(COD)]2 with lithium diphenylphosphide in THF at room temperature produces the corresponding diphenylphosphido-bridged complexes [M-(μ-PPh2)(COD)]2 in excellent yields. The 1,5-cyclooctadiene (COD) ligands of [Rh(μ-PPh2)(COD)]2 are replaced stepwise by chelating diphosphines, LL (e.g., Ph2P(CH2)nPPh2, n = 1-4) to produce complexes of the types [(LL)Rh(μ-PPh2)2Rh(COD)] and [Rh(μ-PPh2)(LL)]2. In contrast, reactions with the monodentate phosphines PPh3, PMePh2, PEt3, and PCy3 yield only mixed phosphine-COD complexes of the types (R3P)2Rh(μ-PPh2)2Rh(COD) and (Cy3P)Rh(μ-PPh2)2Rh(COD). These unusual complexes possess a rhodium-rhodium bond, two dissymmetrically bridging diphenylphosphido groups, and two different stereochemistries around the rhodium atoms. One rhodium is tetrahedral and surrounded by four phosphorus atoms, and the other rhodium (bonded to COD) is nearly planar. In the (R3P)2Rh(μ-PPh2)2Rh(COD) complexes, the phosphorus resonance of the μ-PPh2 group is shifted downfield approximately 300 ppm compared to the position for analogous complexes of the chelating diphosphines; the large shift is attributed to the formation of the rhodium-rhodium bond.