Chlorination Toluene
Chlorination Toluene - Related Videos
01:31
Radical Substitution: Allylic Chlorination
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2023
Typically, when alkenes react with halogens at low temperatures, an addition reaction occurs. However, upon increasing the temperature or under reaction conditions that form radicals, providing a low but steady concentration of halogen radicals, allylic substitution reaction is favored. This is because allylic hydrogens are very reactive as the formed intermediate is resonance stabilized. For example, when propene is treated with chlorine in the gas phase at 400 °C, it undergoes allylic...
14:17
The Portable Chemical Sterilizer (PCS), D-FENS, and D-FEND ALL: Novel Chlorine Dioxide Decontamination Technologies for the Military
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Cited by 8 •
2014
The Portable Chemical Sterilizer (PCS) is a revolutionary, energy-independent, almost waterless sterilization technology for Army medical units. The PCS generates chlorine dioxide from dry reagents mixed with water on-site, at-will, and at point-of-use (PoU) in a plastic suitcase. The Disinfectant-sprayer for Foods and ENvironmentally-friendly Sanitation (D-FENS) and the Disinfectant for ENvironmentally-friendly Decontamination, All-purpose (D-FEND ALL) produce aqueous chlorine dioxide in a...
07:07
Controlled-release of Chlorine Dioxide in a Perforated Packaging System to Extend the Storage Life and Improve the Safety of Grape Tomatoes
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Cited by 14 •
2017
Here, we describe a protocol for the application of a novel, slow-release ClO2 product that reduces spoilage and extends the shelf life of fresh fruit. The slow-release ClO2 product was added to standard commercial grape tomato packaging and tested against Escherichia coli and Alternaria alternata.
01:15
Electrophilic Aromatic Substitution: Chlorination and Bromination of Benzene
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2025
Chlorination and bromination are important classes of electrophilic aromatic substitutions, where benzene reacts with chlorine or bromine in the presence of a Lewis acid catalyst to give halogenated substitution products. A Lewis acid such as aluminium chloride or ferric chloride catalyzes the chlorination, and ferric bromide catalyzes the bromination reactions. During the bromination of alkenes, bromine polarizes and becomes electrophilic. However, in the bromination of benzene, the bromine...
03:11
Oxidation-Reduction Reactions
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2020
Oxidation–Reduction Reactions Earth’s atmosphere contains about 20% molecular oxygen, O2, a chemically reactive gas that plays an essential role in the metabolism of aerobic organisms and in many environmental processes that shape the world. The term oxidation was originally used to describe chemical reactions involving O2, but its meaning has evolved to refer to a broad and important reaction class known as oxidation–reduction (redox) reactions. Some redox reactions involve the transfer of...
FAQs
Ultraviolet light or heat directs chlorine toward free-radical substitution at the benzylic methyl group rather than primarily onto the aromatic ring. This condition therefore favors side-chain chlorination, making the reaction useful for examining how energy input changes reaction pathway and product location in methylbenzene chemistry.
FeCl3 acts as a Lewis acid catalyst that promotes electrophilic aromatic substitution on the benzene ring. The methyl group directs incoming substitution mainly to the ortho and para positions, so this catalytic condition produces a different positional pattern from the side-chain pathway promoted by light or heat.
The reaction displays selectivity because changing the conditions changes both the mechanism and the location of chlorine incorporation. Light or heat favors substitution at the methyl group, whereas chlorine with FeCl3 favors aromatic-ring substitution, especially at ortho and para positions. Comparing these outcomes connects reaction conditions with product structure.
Condition selection depends on whether the desired transformation concerns the side chain or the aromatic ring. Ultraviolet light or heat is associated with free-radical substitution at the benzylic methyl group, while chlorine and FeCl3 are associated with electrophilic substitution on the ring. This choice provides a basic planning principle for obtaining different derivative types.
The conditions provide an initial basis for predicting where chlorine has been introduced. Light or heat indicates a chlorinated side-chain product, while FeCl3 indicates aromatic chlorination with substitution directed mainly to ortho and para positions. Product patterns can therefore be interpreted by relating observed structures to the operative reaction pathway.
Chlorinated aromatic and side-chain derivatives from this reaction serve as intermediates in chemical synthesis and industrial manufacturing. In chemistry education and research, the transformation also provides a compact example of free-radical chemistry, electrophilic aromatic substitution, and condition-dependent selectivity, linking mechanistic reasoning with practical preparation of useful compounds.