1346237-80-6Relevant academic research and scientific papers
Synthesis, structures, and properties of the phosphonium-1-indenylide (PHIN) Ligands 1-C9H6PPh3, 1-C 9H6PMePh2, and 1-C9H 6PMe2Ph and of the corresponding ruthenium(II) Complexes [Ru(η5-C5H5)(η5-PHIN)] PF6
Fowler, Kevin G.,Littlefield, Shalyn L.,Baird, Michael C.,Budzelaar, Peter H. M.
, p. 6098 - 6107 (2011)
Syntheses of the phosphonium-1-indenylide (PHIN) ligands triphenylphosphonium-1-indenylide (1-C9H6PPh3, I), methyldiphenylphosphonium-1-indenylide (1-C9H 6PMePh2, II), and dimethylphenylphosphonium-1-indenylide (1-C9H6PMe2Ph, III) are reported, as are syntheses of the corresponding planar chiral ruthenium(II) complexes [Ru(η5-C5H5)(η5-1-C 9H6PPh3)]PF6 (IV), [Ru(η5-C5H5)(η5-1-C 9H6PMePh2)]PF6 (V), and [Ru(η5-C5H5)(η5-1-C 9H6PMe2Ph)]PF6 (VI). The ruthenium complexes have been characterized by 1H, 13C, and 31P NMR spectroscopy, by X-ray crystallography, and by extensive DFT calculations, which produce optimized geometries consistent with the crystallographic data. The PHIN-Ru bond strengths are calculated to be ～20 kcal/mol greater than the corresponding benzene-Ru bond strength of [Ru(η5-C5H5)(η6-C 6H6)]+ and are compatible with the observed configurational stability of the complexes. That interconversion of enantiomers via interfacial exchange of the η5-bound ligands does not occur is demonstrated by the observation of diastereotopic phenyl groups in the 1H NMR spectrum of V and of diastereotopic methyl groups in the 1H NMR spectrum of VI.
