Equilibrium and kinetic study of the reaction between phthalocyaninato- iron(ii) and carbon monoxide in dimethyl sulphoxide

Claudio Ercolani, Fabrizio Monacelli, Giovanna Pennesi, Gentilina Rossi, Eraldo Antonini, Paolo Ascenzi, Maurizio Brunori

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Abstract

The reaction between carbon monoxide and phthalocyaninatoiron(ll) in dimethyl sulphoxide (dmso) has been studied kinetically and from the equilibrium point of view. In the presence of a large excess of CO, the iron complex adds carbon monoxide in a 1: 1 mole ratio via pseudo-first-order kinetics. The observed rate constant has the form kobc = K1[CO] + kr with kt = 1.28 ± 0.05 103 dm3 mol-1s-1 and kt = 0.12 ± 0.02 s-1 at 20 °C. The equilibrium constant K is close to 1 x 104 dm3 mol-1 and is virtually independent of temperature. The effect of temperature on the rate constants has been investigated and the activation parameters determined; their mechanistic implications are discussed.

Original languageEnglish
Pages (from-to)1120-1123
Number of pages4
JournalJournal of the Chemical Society, Dalton Transactions
Issue number5
DOIs
Publication statusPublished - 1981

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Carbon Monoxide
Dimethyl Sulfoxide
Iron
Kinetics
Rate constants
Equilibrium constants
Chemical activation
Temperature

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Equilibrium and kinetic study of the reaction between phthalocyaninato- iron(ii) and carbon monoxide in dimethyl sulphoxide. / Ercolani, Claudio; Monacelli, Fabrizio; Pennesi, Giovanna; Rossi, Gentilina; Antonini, Eraldo; Ascenzi, Paolo; Brunori, Maurizio.

In: Journal of the Chemical Society, Dalton Transactions, No. 5, 1981, p. 1120-1123.

Research output: Contribution to journalArticle

Ercolani, Claudio ; Monacelli, Fabrizio ; Pennesi, Giovanna ; Rossi, Gentilina ; Antonini, Eraldo ; Ascenzi, Paolo ; Brunori, Maurizio. / Equilibrium and kinetic study of the reaction between phthalocyaninato- iron(ii) and carbon monoxide in dimethyl sulphoxide. In: Journal of the Chemical Society, Dalton Transactions. 1981 ; No. 5. pp. 1120-1123.
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AU - Rossi, Gentilina

AU - Antonini, Eraldo

AU - Ascenzi, Paolo

AU - Brunori, Maurizio

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