Zhao, Pinjing published the artcileDirect Observation of β-Aryl Eliminations from Rh(I) Alkoxides, Quality Control of 596-38-3, the publication is Journal of the American Chemical Society (2006), 128(10), 3124-3125, database is CAplus and MEDLINE.
Rhodium(I) tris-phosphine triaryl alkoxides undergo β-Ph elimination, affording phenylrhodium complexes and diaryl ketones. Ligand substitution of [(PEt3)2Rh[N(SiMe3)2]] with ROH in the presence of PEt3 afforded either [(PEt3)2RhOR] (2a,c; R = CPh3, 9-phenyl-9-xanthenyl) or [(PEt3)3RhOR] [3b–e; R = CMePh2, 9-phenyl-9-xanthenyl, 9-phenyl-9H-fluoren-9-yl, CMe2(CF3)]. Reaction of 2a with an excess of PEt3 gave [(PEt3)3RhPh] and Ph2CO; Ph β-elimination from 3b–d gave similarly [(PEt3)3RhPh] and acetophenone, xanthone and 9-fluorenone, resp. Kinetic results are most consistent with irreversible β-Ph elimination from a bisphosphine-ligated rhodium alkoxide complex. Such bisphosphine complexes result from ligand dissociation from the tris-phosphine complexes and were isolated in some cases. The bisphosphine complexes are stabilized by Rh-Ph interactions, as evidenced by an x-ray structure of 2a, and this structure with a metal-aryl interaction likely illustrates the pathway for C-C bond cleavage.
Journal of the American Chemical Society published new progress about 596-38-3. 596-38-3 belongs to alcohols-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Benzene,Alcohol, name is 9-Phenyl-9H-xanthen-9-ol, and the molecular formula is C6H13N3O2, Quality Control of 596-38-3.
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