1333409-53-2Relevant academic research and scientific papers
Trifluoroacetylacetonate rhodium(III) methyl complexes, cis-[Rh(TFA)(PPh3)2(CH3)(L)][BPh4] and cis-[Rh(TFA)(PPh3)2(CH3)(I)] (L = CH 3CN, NH3, pyridine), in comparison with their acetylacetonate analogs
Shestakova, Elizaveta P.,Varshavsky, Yuri S.,Khrustalev, Viktor N.,Smirnov, Sergei N.,Podkorytov, Ivan S.,Borisova, Marina V.,Nikolskii, Aleksei B.
, p. 3214 - 3222 (2011/10/04)
The oxidative addition of CH3I to planar rhodium(I) complex [Rh(TFA)(PPh3)2] in acetonitrile (TFA is trifluoroacetylacetonate) leads to the formation of cationic, cis-[Rh(TFA)(PPh3)2(CH3)(CH3CN)] [BPh4] (1), or neutral, cis-[Rh(TFA)(PPh3) 2(CH3)(I)] (4), rhodium(III) methyl complexes depending on the reaction conditions. 1 reacts readily with NH3 and pyridine to form cationic complexes, cis-[Rh(TFA)(PPh3)2(CH 3)(NH3)][BPh4] (2) and cis-[Rh(TFA)(PPh 3)2(CH3)(Py)][BPh4] (3), respectively. Acetylacetonate methyl complex of rhodium(III), cis-[Rh(Acac)(PPh3)2(CH3)(I)] (5), was obtained by the action of NaI on cis-[Rh(Acac)(PPh3)2(CH 3)(CH3CN)][BPh4] in acetone at -15 °C. Complexes 1-5 were characterized by elemental analysis, 31P{ 1H}, 1H and 19F NMR. For complexes 2, 3, 4 conductivity data in acetone solutions are reported. The crystal structures of 2 and 3 were determined. NMR parameters of 1-5 and related complexes are discussed from the viewpoint of their isomerism.
