222296-63-1Relevant academic research and scientific papers
New insight into role of ortho-metallation in rhodium triphenylphosphite complexes. Hydrogen mobility in hydrogenation and isomerization of unsaturated substrates
Trzeciak, Anna M.,Ziólkowski, Józef J.
, p. 69 - 76 (2007/10/03)
The hydrogen transfer from two rhodium(I) hydrido complexes HRh{P(OPh)3}4 and HRh(CO){P(OPh)3}3 to methyl acrylate and/or allylbenzene leads to the formation of ortho-metallated complexes Rh{P(OC6H4)(OPh)2}{P(OPh)3} 3 (I) and Rh{P(OC6H4)(OPh)2}(CO){P(OPh)3} 2 (II), respectively. During these reactions unsaturated substrates, methyl acrylate or allylbenzene undergo stoichiometric hydrogenation. A similar reaction was also observed for HRh{P(OR)3}4 complexes (R=3-CH3C6H4, 4-CH3C6H4). The complex HRh{P(OPh)3}4 catalyses the isomerization of hex-1-ene to hex-2-ene in the absence of H2; however at 1 atm of H2 the formation of hexane is observed. Hydrido complexes of the type HRh{P(OR)3}4 in D2 atmosphere undergo H/D exchange at the ortho position of coordinated triarylphosphite. Deuteration of the ortho protons in complexes with R=Ph, 3,5-(CH3)2C6H3 and 4-CH3C6H4 is total, whereas only one ortho hydrogen is replaced in the case of R=3-CH3C6H4. The formation of an ortho-metallated chelating ring causes a downfield shift in the 1H-NMR signal of one proton from the phenyl ring to δ ca. 8 ppm.
Novel rhodium(I) complexes with (2-hydroxyphenyl)diphenylphosphine ligand: Catalytic properties and X-ray structures of Rh(OC6H4PPh2)(CO)(PPh3) and Rh(OC6H4PPh2){P(OPh)3
Trzeciak, Anna M.,Ziolkowski, Jozef J.,Lis, Tadeusz,Choukroun, Robert
, p. 87 - 97 (2007/10/03)
The novel rhodium complexes with the bidentate PO ligand (PO=OC6H4PPh2-) of the form Rh(PO)(CO)L (La=POH=HOC6H4PPh2 (1), PPh3 (2), P(NC4H4/
