When benzene is substituted by halogens only, which one of the following halogens is given the number one position in the ring while writing the name of the compound?
Correct answer: D. Iodine
- A. Bromine
- B. Chlorine
- C. Fluorine
- D. Iodine
Explanation
When benzene is substituted by halogens, the priority for numbering the positions is given to the halogen with the higher atomic number. Iodine has the highest atomic number among the options, and therefore, it is given the number one position in the ring.
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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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