Cyclohexane undergoes free radical substitution reaction with bromine in presence of light or upon heating. It can substitute the hydrogens. The first product is Bromo cyclohexane which can further react by giving polybromo substituted cyclohexanes.
Bromocyclohexane can be prepared by the free radical substitution of bromine to the cyclohexane ring at high temperatures or in presence of electromagnetic radiation. But the reaction is not selective and it gives a mixture of polyhalogenated products.
Benzene will not react with bromine on its own. It requires the help of a type of catalyst called a halogen carrier. These reactions involve electrophilic substitution (as with nitration) where a hydrogen is substituted with The reaction with chlorine and bromine
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A halogen addition reaction is a simple organic reaction where a halogen molecule is added to the carbon–carbon double bond of an alkene functional group. The general chemical formula of the halogen addition reaction is: C=C + X 2 → X−C−C−X (X represents the halogens bromine or chlorine, and in this case, a solvent could be CH 2 Cl 2 ...
Reactions: cis-addition (alk. KMnO4) and trans-addition (bromine), Addition of HX (Markownikoff’s and anti-Markownikoff’s addition), Hydration, Ozonolysis, oxymercuration-demercuration, Hydroboration-oxidation.
Selig, Philipp; Bach, Thorsten: Cyclobutane Ring Opening Reactions of 1,2,2a,8b ... Carbon Skeleton by a Regioselective Bromine-Magnesium Exchange Reaction.
(c) In the absence of ultraviolet radiation, cyclopropane undergoes an addition reaction with bromine. Suggest the structure of the organic product formed in this reaction.  (d) Petrol contains both cyclohexane, C 6H 12, and hexane. Cyclohexane can be prepared from hexane. (i) Construct the equation for this reaction.
Comparison of reactions of Benzene and Cyclohexene with bromine. An addition reaction replaces the pi bonding by new sigma bonds. This is favourable for the relatively weak pi bond of cyclohexane, but not for the more stable delocalised pi bonding of...Some cyclohexane is recovered from petroleum streams by fractionation. The bulky commercial production of cyclohexane is based on hydrogenation of benzene in closed system. Cyclohexane consumption is linked almost entirely to nylon production.