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The influence of reaction temperature on the oscillatory behaviour in the palladium-catalysed phenylacetylene oxidative carbonylation reaction

Lookup NU author(s): Professor Katarina NovakovicORCiD, Dr Arijit Mukherjee, Dr Mark WillisORCiD, Professor Allen Wright

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Abstract

This paper reports the influence of reaction temperature on the occurrence and characteristics of pH oscillations that are observed during the palladium-catalysed phenylacetylene oxidative carbonylation reaction in a catalytic system (PdI2, KI, air, NaOAc) in methanol. Isothermal experiments were performed over the temperature range 10-50 °C. The experiments demonstrate that oscillations occur in the range 10-40°C and that a decrease in reaction temperature results in an increase in the period and amplitude of the pH oscillations. Furthermore, it is observed that during oscillations at any specific temperature, the time taken for pH to increase from a minimum to a maximum value varies with respect to reaction time. However, the time required for the pH to fall from maximum to new minimum is approximately constant with respect to the reaction time and is a function of the reaction temperature. © the Owner Societies 2009.

Publication metadata

Author(s): Novakovic K, Mukherjee A, Willis M, Wright A, Scott S

Publication type: Article

Publication status: Published

Journal: Physical Chemistry Chemical Physics

Year: 2009

Volume: 11

Issue: 40

Pages: 9044-9049

ISSN (print): 1463-9076

ISSN (electronic): 1463-9084

Publisher: Royal Society of Chemistry

URL: http://dx.doi.org/10.1039/b905444h

DOI: 10.1039/b905444h

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