Q12. - Organic Chemistry

Question

Give the structure corresponding to each IUPAC name. 

a. 1,2-dimethylcyclobutane     

b. 1,1,2-trimethylcyclopropane 

c. 4-ethyl-1,2-dimethylcyclohexane

d. 1-sec-butyl-3-isopropylcyclopentane

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

 

Step-by-Step Solution

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 the different compounds could be done.

Step 2. Structure of a

The IUPAC name is given as 1,2-dimethylcyclobutane. It consists of four carbon atoms in 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 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 cyclic form. Methyl groups are present at C-1 and C-2 atoms, and ethyl group is present at 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 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 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