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Updated: Sep 15, 2025
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Accessing Valuable Ligand Supports for Transition Metals: A Modified, Intermediate Scale Preparation of 1,2,3,4,5-Pentamethylcyclopentadiene
Published on: March 20, 2017
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An Eco-Friendly Method for Saturated Hydrocarbon Chlorination: Exploring the Potential of First-Row Transition Metal
Eduardo S Neves1,2, Leonardo M Lube3, Lívia R Oliveira2
1Laboratório de Ciências Químicas, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ 28013-602, Brazil.
ACS Omega
|July 14, 2025
Summary
This study presents a novel, safer method for chlorinating saturated hydrocarbons using trichloroisocyanuric acid (TCCA) and transition metal catalysts. Copper catalysts demonstrated the highest yields for selective C-H bond functionalization.
Area of Science:
- Organic Chemistry
- Catalysis
- Green Chemistry
Background:
- Functionalizing saturated hydrocarbons is challenging due to the inertness of C-H bonds.
- Developing controlled, efficient, and selective methods for hydrocarbon functionalization is crucial in modern chemistry.
Purpose of the Study:
- To introduce a new chlorination method for saturated hydrocarbons.
- To investigate the efficacy of trichloroisocyanuric acid (TCCA) as a halogenating agent.
- To explore the catalytic activity of first-row transition metal salts in this reaction.
Main Methods:
- Employed trichloroisocyanuric acid (TCCA) as the halogenating agent.
- Screened eight transition metal ions (V, Cr, Mn, Fe, Ni, Co, Cu, Zn) and Li+ as catalysts.
- Tested four hydrocarbon substrates (cyclohexane, n-hexane, cycloheptane, norbornane) at varying temperatures (25, 50, 75 °C).
Main Results:
- Copper(II) perchlorate hexahydrate (Cu(ClO4)2·6H2O) as catalyst at 75 °C yielded the highest product yields.
- Yields up to 44.6% were achieved for various chlorinated hydrocarbons.
- Higher temperatures increased yields but decreased selectivity, favoring dichlorination.
Conclusions:
- The TCCA-based system provides a safer and more efficient alternative for selective hydrocarbon chlorination.
- The method demonstrates broad applicability and achieves high yields.
- Optimized conditions offer a promising route for C-H bond functionalization.
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