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Kinetics and mechanisms of the formation of a sitting-atop complex of N-alkylporphyrin with Al(III) in moist acetonitrile

KEIICHI TSUKAHARA

Department of Chemistry, Faculty of Science, Nara Women's University, Nara 630-8506, Japan

Corresponding author, Department of Chemistry, Faculty of Science, Nara Women's University, Nara 630-8506, Japan.

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YOSHIAKI ONOUE

Nara Ikuei High School, Nara 630-8558, Japan

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NAOKO FUJIWARA

Department of Chemistry, Faculty of Science, Nara Women's University, Nara 630-8506, Japan

Current address: Department of Energy and the Environment, Osaka National Research Institute, Ikeda, Osaka 563-8577, Japan.

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https://doi.org/10.1002/jpp.372Cited by:4 (Source: Crossref)

Abstract

The formation of a sitting-atop complex of a N-alkylporphyrin, containing a 6-hydroxyhexyl group, with Al³⁺ was studied in moist acetonitrile by equilibrium and kinetic measurements. A sandwich type of metalloporphyrin, where a metal ion binds two N-alkylporphyrins, appears to be formed under the conditions that porphyrins exist in excess over a metal ion. When a large excess of metal ion was used, a 1:1 type of sitting-atop complex of Al(III)N-alkylporphyrin was produced through formation of the sandwich type of Al(III)N-alkylporphyrin.

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