197921-92-9Relevant academic research and scientific papers
Reaction of singlet oxygen with Ir(I) and Rh(I) thiolato complexes: Oxidative addition vs. S-oxidation
Ho, David G.,Ismail, Rehana,Franco, Nestor,Gao, Ruomei,Leverich, Edward P.,Tsyba, Irina,Nam, Nhat Ho,Bau, Robert,Selke, Matthias
, p. 570 - 571 (2007/10/03)
Singlet oxygen reacts with Ir(I) and Rh(I) thiolato complexes to form the corresponding Ir(III) and Rh(III) peroxo thiolato complexes which do not undergo intramolecular oxidation of the thiolate moiety.
Rhodium(I) fluorothiolate complexes as hydroformylation catalyst precursors. Crystal structure of two polymorphs of trans-[Rh(SC6F5) (CO) (PPh3) 2]
Fierro,Martinez-Ripoll,Merchan,Rodriguez,Terreros,Torrens,Vivar-Cerrato
, p. 243 - 255 (2007/10/03)
The perfluorothiolate dinuclear compounds [Rh( μ,-SC6F5)(COD)]2 1 and [Rh( μ-SC6F5)(CO)2]2 2 react with PPh3 to give monomeric and dimeric complexes, the particular product depending upon the PR3/Rh ratio and reaction conditions. Reaction of 2 with 2 moles of PPh3 renders cis-7 and trans-[Rh( μ-SC6F5)((CO)(PPh3)]2 8, while with 4 moles of PPh3 trans[Rh(SC6F5)(CO)(PPh3)2]10a is obtained. This latter product can otherwise be prepared by Cl metathesis from trans-[RhCl(CO(PPh3)2] in toluene. This same reaction in dichloromethane however yields the cis isomer 10b. When a larger excess of PPh3 is used, a mixture of compounds 11a and 11b is formed. An X-ray crystal structure study shows trans[Rh(SC6F5)(CO)(PPh3)2] to exit as two polymorphs. 11a crystallises in the space group P21/n of the monoclinic system with a = 12.489(1), b= 15.430(5), c= 19.719(1) A, α = γ = 90, β = 92.84(1)°, and 11b is triclinic, space group P1 with a =9.764(2), b= 12.197(6), c= 17.880 A, α = 100.18(5), β = 101.92(2), γ = 113.61(2)°. Both PPh3 ligands are mutually trans and the difference in v(CO) stretching frequencies, 1989 and 1939 cm-1, can be explained in terms of o-phenyl H. . . CO interactions in the latter. The [Rh( μ-SC6F5)(COD)]2 1 and [Rh( μ-SC6F5)(CO)2]2 2/nPPh3 systems have been studied as catalyst precursors for the hydroformylation of 1-heptene in toluene at 30 bar and 343 K. Selectivity towards the linear aldehyde is enhanced when dimeric complexes are used.
Rhodium pentafluorophenylthiolate complexes derived from
Carlton, Laurence
, p. 103 - 115 (2007/10/02)
The thiolate bridges of are readily split by a variety of phosphines, phosphites and nitrogen-containing compounds to give , 3>, and , (PR3 = PMe2Ph, PMePh2; P(OR')3 = P(OMe)3, P(OEt)3; L (sterically nonhindering) = pyridine, 3-methylpyridine, isoquinoline, N-methylimidazole, acetonitrile; L' (sterically hindering) = 2-methylpyridine, 2,6-dimethylpyridine, quinoline).With H2 under ambient conditions both and combine reversibly, does not react and 3> (in the presence of free P(OR')3) is converted into 4>. and react with phenylacetylene to give and , respectively, while with C6F5SH forms , and further reaction gives .Although is unreactive towards C6F5SH it combines with PhC2H with loss of C6F5SH yielding .Other reagents which split the bridge are carbon monoxide and t-butyl isocyanide.Products were characterised by 1H and 31P NMR spectroscopy and in many cases were not isolated.
