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Q.7.

Expert-verified
Organic Chemistry
Found in: Page 128

Short Answer

Question: Give IUPAC name of each compound.

a.

b.

c.

d.

Answer

The IUPAC names of given compounds are as follows:

  1. 4-tert-butyl-4-methyloctane
  2. 2,4-dimethylhexane
  3. 3-methyl-6-(propan-2-yl) nonane
  4. 2,4-dimethylheptane
See the step by step solution

Step by Step Solution

Step 1: Elucidation of organic compounds by IUPAC nomenclature

The longest carbon chain is determined, and the carbon atoms in it are counted to get the root word. The root word is used as a suffix.

  • Four carbon atoms-But
  • Five carbon atoms-Pent
  • Six carbons atoms- Hex

Step 2: IUPAC rules for naming

The bonds are represented by suffixes.

  • -ane: single bond
  • -ene: double bond
  • -yne: triple bond

After this, the substituent is observed, and the prefix is determined by using the lowest possible numbers. Multiple substituents are named on the basis of preferences and alphabetical order.

Step 3: IUPAC names of the given compounds

a. In the structure, the largest carbon chain is octane. Here, the substituents are methyl and tertiary butyl.

The position and the order of substituents give the name of the compound as 4-tert-butyl-4-methyloctane.

b. In the structure, the largest carbon chain is hexane. Here, the substituents are two methyl groups.

The position and the order of substituents give the name of the compound as 2,4-dimethylhexane.

c. In the structure, the largest carbon chain is nonane. Here, the substituents are methyl and propyl groups.

The position and the order of substituent give the name of the compound as 3-methyl-6-(propan-2-yl)nonane.

d. In the structure, heptane is the longest chain. Here, the substituents are two methyl groups.

The position and the order of substituent give the name of the compound as 2,4-dimethylheptane.

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