Copolymerization of ethylene and carbon monoxide using [(dppp)Pd(H2O)(TsO)](TsO) as a catalyst precursor: rate equation

Fatutto, Daniele ; Toniolo, Luigi ; Chaudhari, Raghunath V. (1999) Copolymerization of ethylene and carbon monoxide using [(dppp)Pd(H2O)(TsO)](TsO) as a catalyst precursor: rate equation Catalysis Today, 48 (1-4). pp. 49-56. ISSN 0920-5861

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S09205...

Related URL: http://dx.doi.org/10.1016/S0920-5861(98)00357-5

Abstract

The influence of CO and C2H4 pressures on their copolymerization catalyzed by the precursor [(dppp)Pd(H2O)(TsO)](TsO) in MeOH has been studied up to 8 Mpa of total pressure at 363 K. Several rate equations, based on two different models, are presented. The so called "one site model"involves a tetracoordinate PdII cation in which only one coordination site is available to the monomers. The "two sites model"involves a pentacoordinate PdII cation in which the monomers coordinate the metal simultaneously at two different sites. In both cases, the other three sites are occupied by the growing polymer chain and the chelating diphosphine. The rate equation that fits the experimental data better is used to optimize the ratio of the monomers pressures to obtain a maximum reaction rate for a given total pressure.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Copolymerization; Carbon Monoxide; Ethylene; Catalysis; Polyketone; Palladium
ID Code:7907
Deposited On:25 Oct 2010 09:14
Last Modified:30 May 2011 04:04

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