147243-76-3

Upstream product

• 147243-71-8 {(P(CH₂CH₂P(C₆H₅)2)3)OsH₂} 
• 143-66-8 sodium tetraphenyl borate 
• 333-27-7 methyl trifluoromethanesulfonate 

Downstream Products

• 147361-44-2 {(P(CH2CH2P(C6H5)2)3)Os(H)(η1-CO(CH3)2)}B(C6H5)4 
• 147361-40-8 {(P(CH₂CH₂P(C₆H₅)2)3)Os(H)(CO)}⁽¹⁺⁾*B(C₆H₅)4^(1-)={(P(CH₂CH₂P(C₆H₅)2)3)Os(H)(CO)}B(C₆H₅)4 
• 151757-17-4 (P(CH₂CH₂P(C₆H₅)2)3)Os(H)(OC(CH₃)CHCHC₆H₅)⁽¹⁺⁾*B(C₆H₅)4^(1-)={(P(CH₂CH₂P(C₆H₅)2)3)Os(H)(OC(CH₃)CHCHC₆H₅)}B(C₆H₅)4 
• 147361-44-2 (P(CH₂CH₂P(C₆H₅)2)3)Os(H)(OC(CH₃)2)⁽¹⁺⁾*B(C₆H₅)4^(1-)={(P(CH₂CH₂P(C₆H₅)2)3)Os(H)(OC(CH₃)2)}B(C₆H₅)4 

Relevant academic research and scientific papers

Classical, nonclassical, and mixed-metal osmium(II) polyhydrides stabilized by the tetraphospbine P(CH2CH2PPh2)3. H/D isotope exchange reactions promoted by a strongly bound dihydrogen ligand

The cis-hydride-η2-dihydrogen complex [(PP3)OsH(η2-H2)]BPh4 (4), PP3 = P(CH2CH2PPh2)3, has been prepared by either protonation of the dihydride [(PP3)OsH2] or reaction of the novel dinitrogen complex [(PP3)OsH(N2)]-BPh4 (6) with H2. The nonclassical structure of 4 has been established in solution by variable-temperature NMR spectroscopy (1H, 31P), T1 measurements, and J(HD) values. An X-ray diffraction analysis has shown that the solid-state geometry of the compound is not inconsistent with the nonclassical assignment. Crystals of 4 are triclinic, space group P1 with a = 16.841(4) A?, b = 15.135(2) A?, c = 12.450(3) A?, α = 91.53(2)°, β = 96.07(2)°, γ = 106.75(2)°, V = 3016.23 A?3, and Z = 2. In the solid state and in solution at low temperature, [(PP3)OsH(η2-H2)]+ is octahedral and the hydride and dihydrogen ligands occupy mutually cis positions. The H2 ligand is trans to the bridgehead phosphorus of PP3. At ambient temperature, 4 is highly fluxional. The dynamic behavior of the complex in solution has been studied by variable-temperature 31P{1H} NMR spectroscopy using the DNMR3 program. A comparison of the chemical properties, in particular H2-displacement reactions, within the series [(PP3)MH(η2-H2)]+ (M = Fe, Ru, Os) leads to the conclusion that the osmium complex has the strongest interaction with the H2 ligand. Complex 4 has been found capable of reacting with (CD3)2CO to give the perdeuterated isotopomer 4-d3 via a keto-enol tautomerization reaction of acetone-d6. The isolation and characterization of the mixed osmium-gold dihydride [(PP3)OsH{η2-HAu(PPh3)}]PF6 has provided experimental evidence for the correctness of the H2 and HAu(PPh3) isolobal relationship. The dinitrogen ligand in 6 can easily be displaced by a plethora of ligands, including weak ones such as THF and acetone. The latter reagent reacts with 6 to form the first example of a stable and isolable cis-hydride-η1-ketone complex, [(PP3)OsH{η1-OC(CH3)2}]BPh 4, a suggested key intermediate in metal-assisted hydrogenation reactions of ketones.