261159-07-3Relevant academic research and scientific papers
Rhodium complexes with the chelating and binucleating ligands P(CH2CH2Py)(n)Ph(3-n) (Py = 2-pyridyl; n = 1, 2): Structures and fluxional behavior
Alonso, M. Aranzazu,Casares, Juan A.,Espinet, Pablo,Soulantica, Katerina,Charmant, Jonathan P. H.,Orpen, A. Guy
, p. 705 - 711 (2000)
Several rhodium(I) complexes of the type [RhX(CO)(PePy2)], [Rh(diene)(PePy)]+, and [Rh(diene)(PePy2)]+ (PePy(n) = P(CH2CH2Py)(n)Ph(3-n); Py = 2-pyridyl; n = 1, 2) have been prepared. The two former are square planar; the latter are pentacoordinated for diene = tetrafluorobenzobarrelene or norbornadiene (confirmed by X-ray diffraction), but an equilibrium of 4- and 5-coordinate isomers exists in solution for diene = 1,5-cyclooctadiene. The fluxional behavior of all these complexes is studied by NMR spectroscopy. The complex [Rh(NBD)(PePy2)]PF6·Cl2CH2 crystallizes in the monoclinic space group P21/n with a = 8.455(1) A , b = 18.068(3) A, c = 19.729(3) A, β = 99.658(3)°, and Z = 4. The complexes [Rh(diene)(PePy2)]+ react with CO to give the dimeric complex [Rh2(CO)2{P(CH2CH2Py)2Ph}2](BF4)2 with the pyridylphosphine acting as P,N-chelating and P,N-bridging.
