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![Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-(phosphinetriyl)tripiperidine]}palladium Under Mild Reaction Conditions](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F51444.jpg&w=3840&q=50)
Mizoroki-Heck Cross-coupling Reactions Catalyzed by Dichloro{bis[1,1',1''-(phosphinetriyl)tripiperidine]}palladium Under Mild Reaction Conditions
Published on: March 20, 2014
Complete dechlorination of DDE/DDD using magnesium/palladium system
Sumit Kumar Gautam1, Sumathi Suresh
1Centre for Environmental Sciences and Engineering, Indian Institute of Technology-Bombay, Mumbai, India.
This study shows that a biosurfactant aids in the dechlorination of DDT residues like DDD and DDE. The magnesium/palladium system effectively removes all chlorine atoms, yielding diphenylethane.
Area of Science:
- Environmental Chemistry
- Organic Chemistry
- Green Chemistry
Background:
- DDT and its residues (DDD, DDE) are persistent organic pollutants.
- Effective methods for their degradation are crucial for environmental remediation.
Purpose of the Study:
- To investigate the kinetics and products of DDD and DDE dechlorination using a biosurfactant and a magnesium/palladium system.
- To assess the potential of biosurfactants as solubilizing agents for DDT residues.
Main Methods:
- Kinetic studies of dechlorination reactions.
- Gas chromatography-mass spectrometry (GC-MS) for product identification.
- Use of 0.05% biosurfactant with zerovalent magnesium/tetravalent palladium catalyst.
Main Results:
- Dechlorination followed second-order kinetics, influenced by acid and reactant concentrations.
- Complete dechlorination of DDE to diphenylethane was observed.
- Partially dechlorinated intermediates and diphenylethane were identified from DDD dechlorination.
Conclusions:
- The magnesium/palladium system effectively achieves complete dechlorination of DDE and DDD.
- Biosurfactants show promise as solubilizing agents for DDT and its related compounds.
- Aryl chlorine removal is proposed as the initial step in DDD dehalogenation.
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