34731-08-3Relevant academic research and scientific papers
X-RAY PHOTOELECTRON SPECTRA OF Rh(III) TRIFLUOROACETATE
Shul'ga, Yu. M.,Gol'dshleger, N. F.,Rubtsov, V. I.,Sokol, V. I.
, p. 1193 - 1195 (1992)
A study was made of the x-ray photoelectron spectra of Rh(I) and Rh(III) trifluoroacetates complexes.It was shown by using the C1s bond energies of the carboxylate carbon atom as a basis that bridging and monodentate coordination of the trifluoroacetate group could be distinguished with high resolution. Keywords: photoelectron spectra, Rh(III) trifluoroacetate.
Reactions of rhodium trifluoroacetate with various Lewis bases. Formation of 4:1 complexes with pyridine and tert-butyl isocyanide and rhodium-rhodium bond cleavage with phosphorus donors
Telser, Joshua,Drago, Russell S.
, p. 2599 - 2606 (2008/10/08)
The title compound was reacted with Lewis bases tetrahydrofuran (THF), dimethyl sulfoxide (Me2SO), N,N-dimethyl-formamide (DMF), piperidine, pyridine, N-methylimidazole, acetonitrile, tert-butyl isocyanide, triphenylphosphine, triphenyl phosphite, dimethylphenylphosphine, and trimethyl phosphite. With THF, Me2SO, acetonitrile, and P(OPh)3, adducts were formed with axial ligands in analogy to previously reported Rh2(O2CR)4L2 complexes. However, for the other nitrogen donors and isocyanide, equatorial adduct formation occurred in solution followed in the case of piperidine and N-methylimidazole by decomposition. With pyridine and t-BuNC, 4:1 adducts were isolated constituting a new type of metal-metal bonded complex. Reaction with PMe2Ph, PPh3, and P(OMe)3 resulted in dimer cleavage to give monomeric Rh(I) and Rh(III) products that were isolated for the latter two bases. IR and 19F, 1H, and 31P NMR spectroscopies were used to characterize the complexes. These methods can distinguish between mono- and bidentate CF3CO2- coordination. Comparison with earlier studies of the Mo2(O2CCF3)4 and Rh2(O2CCH3)4 systems shows the changes in reactivity that occur when the metals or carboxylate ligands are changed in these metal carboxylate dimers. Phosphorus donors do not cleave the Mo-Mo bond in Mo2(O2CCF3)4. Only 2:1 axial adducts with pyridine, t-BuNC, and P(OMe)3 are formed with Rh2(O2CCH3)4.
