Fundamentals of Organic ChemistryChemistryGeneral Organic Chemistry
The IUPAC name of the antiseptic chloroxylenol is:
Options
- A3-chloro-4,5-dimethylphenol
- B4-chloro-2,5-dimethylphenol
- C4-chloro-3,5-dimethylphenol
- D5-chloro-3,4-dimethylphenol
Correct answer
C. 4-chloro-3,5-dimethylphenol
Step-by-step solution
Chloroxylenol is the active ingredient in the antiseptic Dettol. Its common name is para-chloro-meta-xylenol (PCMX). The parent structure is phenol, which has an -OH group attached to a benzene ring at position 1 . The term 'meta-xylenol' indicates the presence of two methyl groups at the meta positions with respect to the -OH group, which are positions 3 and 5 . The term 'para-chloro' indicates that the chlorine atom is at the para position with respect to the -OH group, which is position 4 . Combining these, the