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Updated: Jun 10, 2026

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Published on: June 24, 2022
A recyclable nanoparticle-supported rhodium catalyst for hydrogenation reactions
Maria Michela Dell'Anna1, Vito Gallo, Piero Mastrorilli
1Dipartimento di Ingegneria delle Acque e di Chimica del Politecnico di Bari, via E.Orabona, 4 I-70125 Bari, Italy. mm.dellanna@poliba.it
This study developed a supported rhodium catalyst for mild catalytic hydrogenation of various unsaturated compounds. The catalyst efficiently produced haloanilines from halonitroarenes with high yields, minimizing dehalogenation.
Area of Science:
- Catalysis
- Organometallic Chemistry
- Polymer Science
Background:
- Supported metal catalysts are crucial for efficient chemical transformations.
- Rhodium complexes offer unique catalytic properties for hydrogenation reactions.
- Developing robust and recyclable catalysts is essential for sustainable chemistry.
Purpose of the Study:
- To investigate the catalytic hydrogenation of olefins, unsaturated aldehydes/ketones, nitriles, and nitroarenes.
- To synthesize a novel supported rhodium complex via copolymerization.
- To optimize hydrogenation conditions for minimizing hydro-dehalogenation, particularly for halonitroarenes.
Main Methods:
- Copolymerization of Rh(cod)(aaema) with acrylamides to form a supported rhodium complex.
- Catalytic hydrogenation reactions performed under mild conditions (room temperature, 20 bar H2).
- Analysis of reaction products to determine yields and selectivity, focusing on haloaniline formation.
Main Results:
- The supported rhodium complex effectively catalyzed the hydrogenation of various unsaturated functional groups.
- Hydrogenation of halonitroarenes yielded haloanilines with high efficiency.
- Yields for haloanilines ranged from 85% for bromoaniline to 98% for chloroaniline, with minimal hydro-dehalogenation.
Conclusions:
- The developed supported rhodium catalyst is highly effective for mild catalytic hydrogenation.
- This method offers a selective route to haloanilines from halonitroarenes.
- The catalyst's ability to minimize dehalogenation makes it valuable for synthesizing halogenated anilines.
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