Phenols Nomenclature MDCAT Quiz refers to the systematic rules in naming phenolic compounds based on IUPAC guidelines. These set rules help MDCAT students understand how to name phenols, which consist of a hydroxyl group (-OH) attached to an aromatic benzene ring. The correct nomenclature of phenols is indispensable in the identification and distinction of different organic compounds.
Step 1: Parent Chain: The parent chain of phenols is always the benzene ring (C₆H₆), and the presence of the hydroxyl group (-OH) is noted by adding the suffix -ol to the name.
Step 2: Position of Hydroxyl Group If only one hydroxyl group is present on the benzene ring, then it is simply named as phenol. In the case of more than one hydroxyl group, their positions on the benzene ring are indicated with the help of numbers (for example, 1,2-dihydroxybenzene for resorcinol). The hydroxyl group is always assigned the lowest possible number.
Step 3: Substituents: Any other substituents (for example, methyl, nitro, halogens) present on the benzene ring are named as prefixes, and their positions are shown by numbers with relation to the hydroxyl group. Thus, 4-chlorophenol is the name of the phenol with a chlorine atom at the para position with respect to the hydroxyl group.
Step 4: Polyhydroxy Phenols If the phenol contains more than one hydroxyl group attached to the benzene ring, then the naming scheme indicates this in the form -diol, -triol, etc., according to the number of hydroxyl groups. Thus, a phenol having three hydroxyl groups located at positions 1,3 and 5 on the benzene ring will be named 1,3,5-trihydroxybenzene.
Examples of simple phenols are the phenol C₆H₅OH (with one hydroxyl group attached to the benzene ring) and the slightly more complex example of 2-methylphenol C₆H₄(OH)(CH₃), in which, along with the hydroxyl group attached to the benzene ring, there is a methyl group attached.
Quiz: Test Your Knowledge of Phenols Nomenclature
Our MDCAT Quiz on phenols nomenclature will help you practice identifying and naming phenols based on IUPAC rules. The quiz has questions about naming both mono- and polyhydroxy phenols and how to assign numbers to positions, as well as determining substituent groups. It helps one develop the skills needed to answer nomenclature-related questions in the MDCAT exam by practicing these types of questions.
Get Your Username and Password for MDCAT Tests
Sign Up Now
Free Flashcard: Key Insights on Phenols Nomenclature
Our free flashcard set on phenol nomenclature provides a concise summary of the IUPAC rules for naming phenols, including the position of the hydroxyl group, the presence of substituents, and how to name polyhydroxy phenols. These flashcards are a quick and effective way to reinforce your knowledge.
The IUPAC name of phenol is __________.
The common name for 2-methylphenol is __________.
Which of the following is the IUPAC name for 4-hydroxybenzaldehyde?
The IUPAC name for 2,4,6-trimethylphenol is __________.
The common name of 3-chlorophenol is __________.
The IUPAC name for 1,2-dihydroxybenzene is __________.
The common name for 2-hydroxy-1,4-benzoquinone is __________.
The IUPAC name for 3,5-dimethylphenol is __________.
Which of the following is the IUPAC name for phenol with a -COOH group?
The common name for 2,4-dimethylphenol is __________.
The IUPAC name of 2,3-dihydroxyphenol is __________.
What is the IUPAC name of the compound with a hydroxyl group at position 1 of the benzene ring and a methoxy group at position 2?
The IUPAC name for 2,5-dimethylphenol is __________.
The IUPAC name for 4-hydroxyphenylacetic acid is __________.
The common name of 2-hydroxybenzophenone is __________.
The IUPAC name for 2-bromophenol is __________.
The IUPAC name of 1,4-dihydroxy-2-nitrobenzene is __________.
The common name for 2,6-dimethylphenol is __________.
The IUPAC name for 1,3,5-trimethylphenol is __________.
The IUPAC name for 2-hydroxybenzoic acid is __________.
The IUPAC name of 2-chloro-5-methylphenol is __________.
The IUPAC name for 3,4-dimethylphenol is __________.
The common name for 2,4-dichlorophenol is __________.
The IUPAC name for 4-nitrophenol is __________.
The common name for 2,4,6-trihydroxyphenol is __________.
The IUPAC name for 1,2-dimethoxybenzene is __________.
The common name of 4-chloro-2-nitrophenol is __________.
The IUPAC name for 2-hydroxy-4-methylphenol is __________.
The IUPAC name for 3,5-dihydroxybenzaldehyde is __________.
The common name for 1,2,3-trihydroxybenzene is __________.
Experience the real exam environment with our expertly designed collection of over 25,000 MCQs MDCAT Mock Tests.
