Catalysis of hydrogen transfer by methods believed to be similar to enzymatic methods

Ефимов, О. Н.; Eremenko, O. N.; Ovcharenko, A. G.; Khidekel, M. L.; Chekrii, P. S.

doi:10.1007/bf00907041

Cited by 10 publications

(7 citation statements)

References 2 publications

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“…30 ohm-1 cm2 in DMF. 18 The conversion of the rhodium(II) to rhodium(I) and the reverse reaction, readily accomplished by exposure to oxygen, may be followed by changes in conductivity and visible, esr, or nmr spectroscopy; the interconversion by reaction with hydrogen and oxygen has been repeated over several cycles.…”

Section: Sirmentioning

confidence: 99%

Bivalent and monovalent rhodium porphyrin complexes

James¹,

Stynes²

1972

J. Am. Chem. Soc.

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Section: Sirmentioning

confidence: 99%

Bivalent and monovalent rhodium porphyrin complexes

James¹,

Stynes²

1972

J. Am. Chem. Soc.

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“…This approach has been exemplified by Holy, who studied the immobilisation of rhodium N ‐phenyl anthranilic acid (RhPAA) and rhodium anthranilic acid (RhAA) onto polystyrene 5–7. The DMF‐soluble (DMF= N , N ‐dimethylformamide) Rh I complex of N ‐phenyl anthranilic acid (PAA) was known as a remarkably active hydrogenation catalyst 8–11. However, upon immobilisation onto polystyrene, the catalyst no longer displayed any activity.…”

Section: Introductionmentioning

confidence: 99%

Modification of Carbon Nanofibres for the Immobilization of Metal Complexes: A Case Study with Rhodium and Anthranilic Acid

et al. 2002

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The immobilisation of the rhodium/anthranilic acid complex onto fishbone carbon nanofibres (CNFs) was executed by means of the following steps: 1) surface oxidation of the fibres, 2) conversion of the oxygen-containing surface groups into acid chloride groups, 3) attachment of anthranilic acid and 4) complexation of rhodium by the attached anthranilic acid. The immobilisation process was followed and the resulting surface species were characterised by IR, X-ray absorption fine structure (XAFS) and X-ray photoelectron spectroscopy (XPS), and by molecular modelling. Anthranilic acid bonds to the CNFs by an amide linkage to the carboxyl groups that are present after surface oxidation of the fibres. The immobilised anthranilic acid coordinates to rhodium through the nitrogen atom and the carboxyl group. The assynthesised Rh III complex itself is not active in the liquid-phase hydrogenation of cyclohexene. Reduction with sodium borohydride yields small particles (d 1.5 ± 2 nm) of rhodium metal that are highly active. The results indicate that different activation procedures for the immobilised Rh/anthranilic acid system should be applied, such as reduction with a milder reducing agent or direct complexation of the rhodium in the Rh I state.

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“…Chekrii and co-workers [1][2][3][4] first reported on the rhodium complex with N-phenyl anthranilic acid (PAA) in the late 1960s. The structure of PAA is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

“…The complex was synthesised by heating equimolar amounts of rhodium chloride and PAA in ethanol followed by treatment of the reaction mixture with sodium borohydride [4]. Various analytical data suggested that the N-phenyl anthranilic acid (RhPAA) complex was a dimer [1]. The mono-substituted ring of the N-phenyl anthranilate ion forms a half-sandwich structure through bonds with one of the rhodium atoms, while the ionised carboxyl group co-ordinates to the second rhodium atom.…”

Section: Introductionmentioning

confidence: 99%

“…The N,N-dimethylformamide (DMF)-soluble Rh(I) complex with PAA was claimed to be a remarkably active hydrogenation catalyst. Benzene and polyaromatic compounds were hydrogenated rapidly at room temperature and 1 atm hydrogen pressure [3]. The complex was synthesised by heating equimolar amounts of rhodium chloride and PAA in ethanol followed by treatment of the reaction mixture with sodium borohydride [4].…”

Section: Introductionmentioning

confidence: 99%

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Rhodium complexes with N-phenyl anthranilic acid ligands as catalysts for hydrogenation

Ros

Lee

Dillen

et al. 2002

Journal of Molecular Catalysis A: Chemical

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The complexes of rhodium with N-phenyl anthranilic acid and anthranilic acid were synthesised and their structure was investigated with infrared spectroscopy. It appears that rhodium interacts with N-phenyl anthranilic acid via the carboxyl and the amine groups. With anthranilic acid, the bond with the amine could not be unambiguously established. X-ray diffraction and elemental analysis data suggest that the complexes are not pure and that the presence of Rh (0) is likely. Catalytic hydrogenation results and mercury poisoning experiments confirm the presence of Rh(0).

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Catalysis of hydrogen transfer by methods believed to be similar to enzymatic methods

Cited by 10 publications

References 2 publications

Bivalent and monovalent rhodium porphyrin complexes

Bivalent and monovalent rhodium porphyrin complexes

Modification of Carbon Nanofibres for the Immobilization of Metal Complexes: A Case Study with Rhodium and Anthranilic Acid

Rhodium complexes with N-phenyl anthranilic acid ligands as catalysts for hydrogenation

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