Zeolite-mediated production of cyclic organic carbonates: Reaction of CO2with styrene oxide on zeolite y impregnated with metal halides

Leonardo P. Ozorio; Fábio J.S. Henrique; James W. Comerford; Michael North; Claudio J.A. Mota

doi:10.1039/d1re00036e

Zeolite-mediated production of cyclic organic carbonates: Reaction of CO₂with styrene oxide on zeolite y impregnated with metal halides

Leonardo P. Ozorio, Fábio J.S. Henrique, James W. Comerford, Michael North, Claudio J.A. Mota^*

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

Zeolites LiY, NaY, KY and ZnY were impregnated with small amounts of the corresponding metal halides (chloride, bromide and iodide) and tested as catalysts for the carboxylation of styrene oxide with CO2. The KI/KY system was tested at 100 °C and 50 bar and yielded 100% of styrene carbonate, by 1H NMR, within 6 h, whereas KI alone required 15 h to achieve the same yield. The reaction occurs inside the zeolite pores, with the metal cations acting as Lewis acidic centers and the impregnated halides as nucleophiles. Theoretical calculations indicated that chlorides are better stabilized within the zeolite cage than iodides, explaining the reactivity order and suggesting a solvent-like behavior of the zeolite structure. This journal is

Original language	English
Pages (from-to)	672-678
Number of pages	7
Journal	Reaction Chemistry and Engineering
Volume	6
Issue number	4
DOIs	https://doi.org/10.1039/d1re00036e
Publication status	Published - 2 Mar 2021

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© The Royal Society of Chemistry.

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Copyright 2021 Elsevier B.V., All rights reserved.

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10.1039/d1re00036e

Cite this

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abstract = "Zeolites LiY, NaY, KY and ZnY were impregnated with small amounts of the corresponding metal halides (chloride, bromide and iodide) and tested as catalysts for the carboxylation of styrene oxide with CO2. The KI/KY system was tested at 100 °C and 50 bar and yielded 100% of styrene carbonate, by 1H NMR, within 6 h, whereas KI alone required 15 h to achieve the same yield. The reaction occurs inside the zeolite pores, with the metal cations acting as Lewis acidic centers and the impregnated halides as nucleophiles. Theoretical calculations indicated that chlorides are better stabilized within the zeolite cage than iodides, explaining the reactivity order and suggesting a solvent-like behavior of the zeolite structure. This journal is ",

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AU - Ozorio, Leonardo P.

AU - Henrique, Fábio J.S.

AU - Comerford, James W.

AU - North, Michael

AU - Mota, Claudio J.A.

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