Insertion reactions of the [RhCl(PPh<sub>3</sub>)<sub>2</sub>] fragment into a phosphirene ring, and carbonylation of the resulting rhodium(<scp>III</scp>) complex. Crystal and molecular structures of [RhCl(PPhCPhCPh)(PPh<sub>3</sub>)<sub>2</sub>], [RhCl(PPhCPhCPhCO)(PPh<sub>3</sub>)<sub>2</sub>] and the novel dimeric complex [{RhCl(PPhCPhCPhCO)(PPh<sub>3</sub>)}<sub>2</sub>]
作者:Florence A. Ajulu、Duncan Carmichael、Peter B. Hitchcock、François Mathey、Mohamed F. Meidine、John F. Nixon、Louis Ricard、M. Louise Riley
DOI:10.1039/c39920000750
日期:——
The first example of insertion of the d8 RhI fragment [RhCl(PPh3)2] into a phosphirene ring system results in a five-coordinate RhIII complex, which undergoes insertion of carbon monoxide to give either monomeric [[graphicomitted]O)(PPh3)2] or dimeric [[graphicomitted]O)(PPH3)}2], the structures of which have been elucidated by NMR spectroscopy and single-crystal X-ray diffraction studies.
Synthesis and reactivity of the rhodium monocarbollide complexes [1-NHCMe2-2-Cl-2-PPh3-closo-2,1-RhCB10H10] and [1-NH3-2-Cl-2-PPh3-closo-2,1-RhCB10H10]
作者:Jason A. Kautz、Denis A. Kissounko、Natalia S. Kissounko、F.Gordon A. Stone
DOI:10.1016/s0022-328x(02)01218-4
日期:2002.5
2-μ-NHC(R)O}-2-PPh3-closo-2,1-RhCB10H10] [R=Me (3), CMeCH2 (4a), and (E)-CHCHMe (4b)], respectively. Benzoyl bromide with 2 and Na2CO3 yields [1,2-μ-NHC(Ph)O}-2-PPh3-closo-2,1-RhCB10H10] (5). An XRD study of 4a established that the acyl group is coordinated to the rhodium through the oxygen. In the crystal molecules lie pair-wise linked by a BH⇀Rhbridge so that in one molecule the rhodium atom
Synthesis of a rhodium(III) triphenylphosphine complex via C S bond cleavage of an azo-thioether ligand: X-ray structure, electrochemistry and catalysis towards transfer hydrogenation of ketones
rhodium(III) triphenylphosphine complex having the general formula [Rh(PPh3)2(L)Cl] (1) was synthesized by C S bond cleavage of an ONS donor azo-thioether ligand (L-CH2Ph). The complex was thoroughly characterized by various spectroscopic techniques. Its single crystal X-raystructure exhibits an octahedral geometry around the rhodium(III) center. A cyclic voltammogram of the complex exhibits ligand based quasi-irreversible
Synthesis of thiolato bridged dimeric rhodium(III) triphenylphosphine complex via C–S bond cleavage: X-ray structure, DFT computation and catalytic evaluation towards transfer hydrogenation of ketones
have synthesized a new dimeric rhodium(III) triphenylphospine complex, [Rh2(PPh3)2(L)2Cl2] (1) via sp3(C)–S bond cleavage of a thioether containing ligand, 1-(((2-(ethylthio)phenyl)diazenyl)methyl)naphthalen-2-ol (L-CH2CH3). The complex was thoroughly characterized by using various spectroscopic techniques. Dimeric structure with distorted octahedral geometry of each of the rhodium center is confirmed
Development and Mechanistic Study of Quinoline-Directed Acyl C–O Bond Activation and Alkene Oxyacylation Reactions
作者:Giang T. Hoang、Dylan J. Walsh、Kathryn A. McGarry、Constance B. Anderson、Christopher J. Douglas
DOI:10.1021/acs.joc.6b03011
日期:2017.3.17
acyl substituent across an alkene, oxyacylation of alkenes, using rhodium catalyzed C–O bond activation of an 8-quinolinyl ester is described. Our unsuccessful attempts at intramolecular carboacylation of ketones via C–C bond activation ultimately informed our choice to pursue and develop the intramolecular oxyacylation of alkenes via quinoline-directed C–O bond activation. We provide a full account