o- and p- directing groups have all of the following properties EXPECT:
Correct answer: C. They have all lone pair at the central atom of molecules except alkyl group
- A. They are electron-donating groups
- B. They increase reactivity of mono- substituted benzene ring
- C. They have all lone pair at the central atom of molecules except alkyl group
- D. Halogeno-substituted benzene is less reactive than benzene
Explanation
o- and p- directing groups are known for their ability to direct incoming substituents to the ortho and para positions on a benzene ring. However, halogeno-substituted benzene is an exception to this rule as halogens are electron-withdrawing and decrease reactivity, making it less reactive than benzene itself. This is why the statement that 'Halogeno-substituted benzene is more reactive than benzene' is the correct answer.
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About Chemistry of Hydrocarbons
Hydrocarbons are studied through the structures and reactions of alkanes, alkenes, alkynes and aromatic compounds. Coverage includes free radical substitution in alkanes, electrophilic addition to carbon-carbon multiple bonds, benzene substitution, aromatic stability and the difference between addition reactions of alkenes and substitution reactions of benzene.
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