Q. 3-3-26E-b - Organic Chemistry (Mcmurry)

Question

Draw the structures of the following molecules:

 

(b) Ethylenimine,  ${\mathbf{C}}_{\mathbf{2}}{\mathbf{H}}_{\mathbf{5}}\mathbf{N}$, a substance used in the synthesis of

melamine polymers; it contains no multiple bonds.

Step-by-Step Solution

Answer

(b) 

                      

 

Ethylenimine

Ethylenimine is also termed aziridine and possess a molecular formula ${\left({\mathrm{CH}}_2\right)}_{\mathbf{2}}\mathbf{NH}$. This compound has an importance in the medicinal chemistry.

Structure of ethylenimine

(b)The structure of the molecule can be drawn with the help of degree of unsaturation. The degree of unsaturation of the molecule can be given as:

$$\begin{gathered} \mathrm{Degree} \mathrm{of} \mathrm{unsaturation} =\frac{2\mathrm{C}+2+\mathrm{N}-\mathrm{H}-\mathrm{X}}{2} \\ =\frac{2\times 2+2+1-5-0}{2} \\ =\frac{4+2+1-5}{2} \\ =1 \end{gathered}$$

The degree of unsaturation of ethylenimine is one. From the question, the compound does not have multiple bonds. The compound ethylenimine contains one ring.

The structure of ethylenimine can be given as shown below.

                     

                                    Structure of ethylenimine