Kinetic studies of a catalyzed metalloporphyrin formation

Kinetic studies of a catalyzed metalloporphyrin formation

Kinetics of the incorporation of mercury(II) ion in tetra (p‐trimethylammoniumphenyl)porphine have been investigated in aqueous solution at 30.0°C and 0.2 M (NaNO3) ionic strength. The reaction was found to be first order each in mercury(II) and the porphyrin. The forward (formation) and the reverse...

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Veröffentlicht in:International journal of chemical kinetics 1984-09, Vol.16 (9), p.1075-1083
Hauptverfasser: Adeyemo, Adegboye O., Krishnamurthy, M.
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Sprache:eng
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Bioinorganic chemistry
Chemistry
Exact sciences and technology
Inorganic chemistry and origins of life
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creator Adeyemo, Adegboye O.
Krishnamurthy, M.
description Kinetics of the incorporation of mercury(II) ion in tetra (p‐trimethylammoniumphenyl)porphine have been investigated in aqueous solution at 30.0°C and 0.2 M (NaNO3) ionic strength. The reaction was found to be first order each in mercury(II) and the porphyrin. The forward (formation) and the reverse (dissociation) rate constants were found to be 1.9 ± 0.2 × 103 M−1 s−1 and 7 ± 2 × 106 M−1 s−1, respectively. Kinetics of zinc(II) incorporation in tetra(p‐trimethylammoniumphenyl)porphine catalyzed by mercury(II) were also investigated. This catalysis is explained in terms of steady‐state formation of mono mercury(II) porphyrin followed by zinc(II) displacement of mercury(II) ion from the porphyrin. Such a mechanism also illustrates the importance of porphyrin core deformation to metal incorporation.
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subjects Bioinorganic chemistry
Chemistry
Exact sciences and technology
Inorganic chemistry and origins of life
title Kinetic studies of a catalyzed metalloporphyrin formation
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