Kinetics and mechanism of styrene hydroalkoxycarbonylation catalyzed by the complex PdCl2(Ph3P)2 in the presence of butanol

The single-factor experiment method was used to study the kinetics of styrene hydrobutoxycarbonylation catalyzed by the complex PdG2(Ph3P)2 in dioxane (383 K, [BuOH] = 1–8 mol/1). The rates of accumulation of the regioisomeric reaction products as empirical functions of CO pressure and concentration...

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Bibliographic Details
Published in:Kinetics and catalysis 2000, Vol.41 (4), p.511-516
Main Authors: NOSKOV, Y. G, SIMONOV, A. I, PETROV, E. S
Format: Article
Language:rus ; eng
Subjects:
Butanol
Kinetics
Reaction kinetics
Reaction products
Solvation
Styrenes
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Summary:The single-factor experiment method was used to study the kinetics of styrene hydrobutoxycarbonylation catalyzed by the complex PdG2(Ph3P)2 in dioxane (383 K, [BuOH] = 1–8 mol/1). The rates of accumulation of the regioisomeric reaction products as empirical functions of CO pressure and concentrations of styrene, triphenylphosphine, and the catalyst were found. The acyl complex (PhC2H4CO)PdCl(Ph3P)2 was isolated from the reaction mixture. The assumed intermediate of an alcoholate mechanism, the (BuOOC)PdCl(Ph3P)2 complex, is not formed by the reaction of PdCl2(Ph3P)2 with CO and butanol. The set of data generally corresponds to a hydride mechanism of styrene hydrocarboxylation, which includes three key intermediates HPdCIL2-n(CO)n (n= 0–2). A change in the solvation properties of the reaction medium due to the replacement of water by butanol affects the kinetic scheme of the process.
ISSN:0023-1584
1608-3210
DOI:10.1007/BF02756067