Sonolysis of chlorobenzene in the presence of transition metal salts

• Authors: Carmen Stavarache , Rokura Nishimura , Yasuaki Maeda , Mircea Vinatoru
• Languages of publication: EN

Abstracts

EN

Sonolysis of aqueous solution of chlorobenzene at 200 kHz frequency in the presence of transition metals chlorides was investigated. Through analyzing the nature and distribution of the products detected in the reaction mixture, a new mechanism of sonodegradation is advanced. Depending on the metals used and their behavior during sonolysis, we were able to discriminate between inside and outside cavitation bubble mechanisms. Iron and cobalt chlorides, which could undergo redox reactions in the presence of HO radicals generated ultrasonically, give higher amounts of phenolic compounds compared with palladium chloride that undergoes a reduction to metal. Palladium reduction takes place in bulk solution and therefore all organic reactions that compete for hydrogen must occur also in bulk solution. Accordingly, palladium can be a useful tool in determining the reaction site and the decomposition mechanism of organic compounds under ultrasonic irradiation.

Keywords

EN

chlorobenzene; ultrasound; sonolysis mechanism; transition metals

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2003
• Volume: 1
• Issue: 4
• Pages: 339-355

Dates

published

1 - 12 - 2003

online

1 - 12 - 2003

Contributors

author

Carmen Stavarache

• Costin D. Nenitzescul, Institute of Organic Chemistry, PO-Box 15-254, 71141, Bucharest, Romania

author

Rokura Nishimura

• Department of Applied Material Science, College of Engineering, Osaka Prefecture University, Gakuen-cho 1-1, 599-8531, Sakai, Osaka, Japan

author

Yasuaki Maeda

• Department of Applied Material Science, College of Engineering, Osaka Prefecture University, Gakuen-cho 1-1, 599-8531, Sakai, Osaka, Japan

author

Mircea Vinatoru

• Costin D. Nenitzescul, Institute of Organic Chemistry, PO-Box 15-254, 71141, Bucharest, Romania

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Identifiers

DOI

10.2478/BF02475221