Q.12. - Organic Chemistry

Question

Question: Give the structure corresponding to each IUPAC name. 

a. 1,2-dimethylcyclobutane d. 1-sec-butyl-3-isopropylcyclopentane 

b. 1,1,2-trimethylcyclopropane e. 1,1,2,3,4-pentamethylcycloheptane 

c. 4-ethyl-1,2-dimethylcyclohexane

Step-by-Step Solution

Answer

Answer

a.

b. 

c. 

d.

e.

Step 1: IUPAC

IUPAC nomenclature is applicable all over the world. With the help of it, the naming of different compounds can be done.

Step 2: Structure of a

The IUPAC name is given as 1,2-dimethylcyclobutane. It consists of four carbon atoms in a cyclic form. Methyl groups are present at C-1 and C-2 atoms, respectively. The structure is shown below:

Structure of 1,2-dimethylcyclobutane

Step 3: Structure of b

The IUPAC name is given as 1,1,2-trimethylcyclopropane. It consists of three carbon atoms in a cyclic form. Methyl groups are present at C-1, C-1, and C-2 atoms, respectively. The structure is shown below:

Structure of 1,1,2-trimethylcyclopropane

Step 4: Structure of c

The IUPAC name is given as 4-ethyl-1,2-dimethylcyclohexane. It consists of a six-carbon atom in a cyclic form. Methyl groups are present at C-1 and C-2 atoms, and an ethyl group is present at the C-4 atom, respectively. The structure is shown below:

Structure of 4-ethyl-1,2-dimethylcyclohexane

Step 5: Structure of d

The IUPAC name is given as 1-sec-butyl-3-isopropylcyclopentane. It consists of five carbon atoms in a cyclic form. The sec-butyl and isopropyl groups are present at C-1 and C-3 atoms, respectively. The structure is shown below:

Structure of 1-sec-butyl-3-isopropylcyclopentane

Step 6: Structure of e

The IUPAC name is given as 1,1,2,3,4-pentamethylcycloheptane. It consists of seven carbon atoms in a cyclic form. The methyl groups are present at C-1, C-1, C-2, C-3, and C-4 atoms, respectively. The structure is shown below:

Structure of 1,1,2,3,4-pentamethylcycloheptane