Catalytic hydroformylation of alkenes with cationic dinuclear rhodium(I) complexes, and the effect of the couter ions

J. C. Bayón; P. Esteban; J. Real; C. Claver; A. Polo; A. Ruiz; S. Castillón

doi:10.1016/0022-328X(91)86488-C

Catalytic hydroformylation of alkenes with cationic dinuclear rhodium(I) complexes, and the effect of the couter ions

J. C. Bayón, P. Esteban, J. Real, C. Claver, A. Polo, A. Ruiz, S. Castillón

Department of Chemistry

Research output: Contribution to journal › Article › Research › peer-review

13 Citations (Scopus)

Abstract

The complexes [Rh2μ-L)2L′2L″2]A2 (L = S(CH2)3N(CH3)2(CH2C6H5), derived from 3-mercaptopropylbenzyldimethylammonium bromide; L′ = l″ = 1 2 cyclooctadiene (cod) or L′ = L″ = Co or L′ = CO and L″ = PPh3; A = Br, PF6) have been prepared in good yield from [Rh2(μ-Cl)2(cod)2] by simple ligand substitution methods. The hexafluorophosphates catalyse hydroformylation of 1-heptene under mild conditions, and with no hydrogenation side products, in the presence of various phosphorous ligands as cocatalysts. In contrast, none of the bromides exhbited catalytic activity and furthermore addition of tetrabuthylammonium bromide to a working catalytic system quenched the reaction. The poisoning effect of bromide is discussed in terms of the formation of a labile pentacoordinated species, as indicated by the IR spectra in the sensitive carbonyl region. © 1991.

Original language	English
Pages (from-to)	393-399
Journal	Journal of Organometallic Chemistry
Volume	403
Issue number	3
DOIs	https://doi.org/10.1016/0022-328X(91)86488-C
Publication status	Published - 19 Feb 1991

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@article{9e9f7747540c40f19d4dee0dbaa74463,

title = "Catalytic hydroformylation of alkenes with cationic dinuclear rhodium(I) complexes, and the effect of the couter ions",

abstract = "The complexes [Rh2μ-L)2L′2L″2]A2 (L = S(CH2)3N(CH3)2(CH2C6H5), derived from 3-mercaptopropylbenzyldimethylammonium bromide; L′ = l″ = 1 2 cyclooctadiene (cod) or L′ = L″ = Co or L′ = CO and L″ = PPh3; A = Br, PF6) have been prepared in good yield from [Rh2(μ-Cl)2(cod)2] by simple ligand substitution methods. The hexafluorophosphates catalyse hydroformylation of 1-heptene under mild conditions, and with no hydrogenation side products, in the presence of various phosphorous ligands as cocatalysts. In contrast, none of the bromides exhbited catalytic activity and furthermore addition of tetrabuthylammonium bromide to a working catalytic system quenched the reaction. The poisoning effect of bromide is discussed in terms of the formation of a labile pentacoordinated species, as indicated by the IR spectra in the sensitive carbonyl region. {\textcopyright} 1991.",

author = "Bay{\'o}n, {J. C.} and P. Esteban and J. Real and C. Claver and A. Polo and A. Ruiz and S. Castill{\'o}n",

year = "1991",

month = feb,

day = "19",

doi = "10.1016/0022-328X(91)86488-C",

language = "English",

volume = "403",

pages = "393--399",

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TY - JOUR

T1 - Catalytic hydroformylation of alkenes with cationic dinuclear rhodium(I) complexes, and the effect of the couter ions

AU - Bayón, J. C.

AU - Esteban, P.

AU - Real, J.

AU - Claver, C.

AU - Polo, A.

AU - Ruiz, A.

AU - Castillón, S.

PY - 1991/2/19

Y1 - 1991/2/19

N2 - The complexes [Rh2μ-L)2L′2L″2]A2 (L = S(CH2)3N(CH3)2(CH2C6H5), derived from 3-mercaptopropylbenzyldimethylammonium bromide; L′ = l″ = 1 2 cyclooctadiene (cod) or L′ = L″ = Co or L′ = CO and L″ = PPh3; A = Br, PF6) have been prepared in good yield from [Rh2(μ-Cl)2(cod)2] by simple ligand substitution methods. The hexafluorophosphates catalyse hydroformylation of 1-heptene under mild conditions, and with no hydrogenation side products, in the presence of various phosphorous ligands as cocatalysts. In contrast, none of the bromides exhbited catalytic activity and furthermore addition of tetrabuthylammonium bromide to a working catalytic system quenched the reaction. The poisoning effect of bromide is discussed in terms of the formation of a labile pentacoordinated species, as indicated by the IR spectra in the sensitive carbonyl region. © 1991.

AB - The complexes [Rh2μ-L)2L′2L″2]A2 (L = S(CH2)3N(CH3)2(CH2C6H5), derived from 3-mercaptopropylbenzyldimethylammonium bromide; L′ = l″ = 1 2 cyclooctadiene (cod) or L′ = L″ = Co or L′ = CO and L″ = PPh3; A = Br, PF6) have been prepared in good yield from [Rh2(μ-Cl)2(cod)2] by simple ligand substitution methods. The hexafluorophosphates catalyse hydroformylation of 1-heptene under mild conditions, and with no hydrogenation side products, in the presence of various phosphorous ligands as cocatalysts. In contrast, none of the bromides exhbited catalytic activity and furthermore addition of tetrabuthylammonium bromide to a working catalytic system quenched the reaction. The poisoning effect of bromide is discussed in terms of the formation of a labile pentacoordinated species, as indicated by the IR spectra in the sensitive carbonyl region. © 1991.

U2 - 10.1016/0022-328X(91)86488-C

DO - 10.1016/0022-328X(91)86488-C

M3 - Article

VL - 403

SP - 393

EP - 399

IS - 3

ER -