High-pressure NMR studies of the water soluble rhodium hydroformylation system

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)85-90
Journal / PublicationCatalysis Letters
Volume2
Issue number2
Publication statusPublished - Mar 1989
Externally publishedYes

Abstract

Rh(CO)2(acac) reacts with P(m-C6H4SO3Na.H2O)3 (P/Rh > 3.5) in water under CO to give HRh(CO)[P(m-C6H4SO3Na)3]3 (1a), the structure of which is similar to HRh(CO) (PPh3)3 (1b). High pressure NMR spectra of an aqueous solution containing 1a and three molar excess of P(m-C6H4SO3Na)3 does not show the formation of new species up to 200 atm of CO:H2(1:1). In contrast, 1b, in the presence of three molar excess of PPh3, is completely converted to HRh(CO)2(PPh3)2 (2b) under 30 atm CO/H2(1:1) in toluene. The activation energy of the dissociation of P(m-C6H4SO3Na)3 from 1a in water was found to be 30±1 kcal/mol, which is 11±1 kcal/mol higher than the dissociation of PPh3 from 1b in toluene. © 1989 J.C. Baltzer A.G. Scientific Publishing Company.

Citation Format(s)

High-pressure NMR studies of the water soluble rhodium hydroformylation system. / Horváth, István T.; Kastrup, Rodney V.; Oswald, Alexis A.; Mozeleski, Edmund J.

In: Catalysis Letters, Vol. 2, No. 2, 03.1989, p. 85-90.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review