Question

What are the isomers of ${\mathrm{C}}_3{\mathrm{H}}_6\mathrm{O}$?

Answer 1

Isomers:

• “Isomers are two or more compounds that have the same chemical formula but a different arrangement of atoms.”
• As the structures of isomers differ, thus the physical/chemical properties also differ.

Double bond equivalent:

• It is the number of double bonds/triple bonds present in organic molecules.

Step 1: Formula used for the calculation of DBE:

• $\mathrm{DBE}=\mathrm{C}+1-\frac{\mathrm{H}}{2}-\frac{\mathrm{X}}{2}-\frac{\mathrm{N}}{2}$
• Where C represents the Carbon atom, H represents Hydrogen atom, X represents Halogen and N is the Nitrogen atom.

Step 2: Calculation of DBE for ${\mathrm{C}}_3{\mathrm{H}}_6\mathrm{O}$:

• $$\begin{gathered} \mathrm{DBE}=3+1-\frac{6}{2}-\frac{0}{2}-\frac{0}{2} \\ \mathrm{DBE}=4-3=1 \end{gathered}$$

This double bond can be $\mathrm{C}=\mathrm{C}$, $\mathrm{C}=\mathrm{O}$ or a ring.

The structures of possible isomers are shown below: