OH CH3 CH3 CH3 OH OH OH Common name Phenol o-Cresol m-Cresol p-Cresol IUPAC name Phenol 2-Methylphenol 3-Methylphenol 4-Methylphenol Dihydroxy derivatives of benzene are known as 1, 2-, 1, 3- and 1, 4-benzenediol. OHOH OH OH Common name IUPAC name Catechol Benzene-1,2-diol OH Resorcinol Benzene-1,3-diol OH Hydroquinone or quinol Benzene-1,4-diol (c) Ethers: Common names of ethers are derived from the names of alkyl/ aryl groups written as separate words in alphabetical order and adding the word ‘ether’ at the end. For example, CH3OC2H5 is ethylmethyl ether. Table 11.2: Common and IUPAC Names of Some Ethers 319 Alcohols, Phenols and Ethers

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