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Issue 8, 2001
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In situ study of diphosphine rhodium systems in asymmetric hydroformylation of styrene

Inmaculada del Río,a  Wim G. J. de Lange,b  Piet W. N. M. van Leeuwenb  and  Carmen Claver*a 
Author affiliations

* Corresponding authors

a Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Pl. Imperial Tarraco I, Tarragona, Spain
E-mail: claver@quimica.urv.es

b Institute of Molecular Chemistry, Nieuwe Achtergracht 166, WV Amsterdam, The Netherlands
E-mail: pwnm@anorg.chem.uva.nl

Abstract

HPNMR and in situ HPIR (HP = High Pressure) spectroscopic techniques were used to study the species present in the hydroformylation of styrene by rhodium disphosphine systems. Rhodium precursors with BDPP [(2S,4S )-bis(diphenylphosphino)pentane] and CHIRAPHOS [(2R,3R)-bis(diphenylphosphino)butane] as the chiral ligands (P–P) were used. The species observed were compared in order to find a relation between the structures and the enantiomeric excesses obtained for both chiral diphosphines. The effect of the P–P ∶ [Rh] molar ratio and the addition of a monophosphine on the enantiomeric excess were studied. It has been found that oxidation of the coordinated chiral diphosphine leads to formation of rhodium species more active but less regio- and enantio-selective.

Graphical abstract: In situ study of diphosphine rhodium systems in asymmetric hydroformylation of styrene

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Publication details

The article was received on 27 Nov 2000, accepted on 19 Feb 2001 and first published on 26 Mar 2001


Article type: Paper
DOI: 10.1039/B009464L
Citation: J. Chem. Soc., Dalton Trans., 2001,0, 1293-1300
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    In situ study of diphosphine rhodium systems in asymmetric hydroformylation of styrene

    I. del Río, W. G. J. de Lange, P. W. N. M. van Leeuwen and C. Claver, J. Chem. Soc., Dalton Trans., 2001, 0, 1293
    DOI: 10.1039/B009464L

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