126206-32-4

Upstream product

• 17084-13-8 potassium hexafluorophosphate 
• 157072-60-1 (carbonyl)(chloro)(hydrido)tris(triphenylphosphine)ruthenium(II) 

Downstream Products

• 148301-14-8 Ru(CO)H(HNCCH₃)(N₂CH(CCH₃)2)(P(C₆H₅)3)2⁽¹⁺⁾*PF₆^(1-)={Ru(C₄₄H₄₂N₃OP₂)}PF₆ 
• 157931-71-0 Ru(CO)H[(C₆H₅)2P(CH₂)2P(C₆H₅)2]2⁽¹⁺⁾*PF₆^(1-)=[Ru(CO)H[(C₆H₅)2P(CH₂)2P(C₆H₅)2]2]PF₆ 
• 157969-06-7 Ru(CO)H[P(C₆H₅)3][(C₆H₅)2P(CH₂)2P(C₆H₅)2(NCCH₃)]⁽¹⁺⁾*PF₆^(1-)=[Ru(CO)H[(C₆H₅)2P(CH₂)2P(C₆H₅)2][P(C₆H₅)3](NCCH₃)]PF₆ 
• 193412-00-9 Ru(P(C₆H₅)3)2(CO)(H)(C₉H₇N)2⁽¹⁺⁾*PF₆^(1-)=[Ru(P(C₆H₅)3)2(CO)(H)(C₉H₇N)2]PF₆ 

Relevant academic research and scientific papers

Oxidation of the ruthenium hydride complex (η5-C5H5)Ru(CO)(PPh3)H: Generation of a dihydrogen complex by oxidatively induced intermolecular proton transfer

Ruthenium hydride (η5-C5H5)Ru(CO)(PPh3)H (1) undergoes a chemically irreversible oxidation at +0.39 V vs the ferrocene/ferrocenium couple. Oxidation of 1 with (η5-C5H5)2Fe+PF 6- (3) in dichloromethane-d2 yields the known dihydrogen complex (η5-C5H5)Ru(CO)(PPh3)(η 2-H2)+ (4) as a primary decomposition product. Ferrocenium oxidation of 1 in acetonitrile-d3 yielded (η5-C5H5)Ru(CO)(PPh3)(NCCD 3)+ (2-d3), HRu(CO)(PPh3)(NCCD3)3+ (5-d9), and cyclopentadiene. Cyclopentadiene and 5-d9 were generated via the prior formation of dihydrogen complex 4. Solutions of independently prepared 4 in acetonitrile-d3 were observed to decompose to yield some 2-d3, but mostly 5-d9 and cyclopentadiene. The results are discussed in terms of an initial proton transfer from cation radical 1?+ to the Ru center of 1, yielding 4. It is proposed that a reversible, base-catalyzed deprotonation/protonation sequence generates an undetected cationic trans dihydride intermediate from which cyclopentadiene is eliminated.

Phenylacetylene dimerization promoted by ruthenium(II) complexes

The complex Ru(CO)(CH=CHPh)Cl(C5H5N)(PPh3)2 and related alkenyl complexes react in methanol or ethanol to give (E,E)-1,4-diphenylbuta-1,3-diene and the ruthenium(II) hydride Ru(CO)H(Cl)(C5H5N)(PPh3)3.Futher reaction of this hydride with the butadiene results in 1,2-reduction to yield (E)-1,4-diphenyl-1-butene.However, the reaction of phenylacetylene with catalytic amounts of ruthenium hydrides gave the dimer (Z)-1,4-diphenylbuten-3-yne.On the other hand, the reaction of 1,2-diphenylethenylruthenium(II) derivatives in methanol or ethanol gave trans-stilbene rather than the butadiene.Several deuteration experiments were performed in order to elucidate the mechanism of formation of (E,E)-1,4-diphenylbuta-1,3-diene and ruthenium hydride from the corresponding alkenyl complexes.