Question

Write down the structural formula and electron-dot formula of any one isomer of hexane ${\mathrm{C}}_6{\mathrm{H}}_{14}$ other than n-hexane.

Answer 1

$\mathbf{2}\mathbf{-}\mathbf{methylpentane}\mathbf{:}$

1. $\mathbf{2}\mathbf{-}\mathbf{methylpentane}$ (as Isohexane) is the isomer form of Hexane.
2. The molecular formula of hexane is ${\mathrm{C}}_6{\mathrm{H}}_{14}$(hexane) has six carbon and $14$ hydrogen.
3. The five possible isomers of hexane$\left({\mathrm{C}}_6{\mathrm{H}}_{14}\right)$ are n-hexane, $3-\mathrm{methylpentane}$, and $2,3-\mathrm{dimethylbutane}$.
4. Isomers are defined as the compounds having same molecular formula but different arrangements of atoms.
5. This compound can have $5$ structural isomers form.
6. This compound is not optically active as it falls under the ${\mathrm{C}}_{\mathrm{n}}{\mathrm{H}}_{\left(2\mathrm{n}+2\right)}$$\left({\mathrm{C}}_6{\mathrm{H}}_{14}\right)$formula and is thus a saturated form.
7. Its Linear Formula is ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{CH}{\left({\mathrm{CH}}_3\right)}_2$.

Structural formula:

1. The structural formula of $2-\mathrm{methylpentane}$ has $5$carbon atoms with methyl a group present at the second position so the structure will be:

Electron-dot formula:

1. The electron-dot formula depicts the number of valence electrons on that structure with the help of dots
2. Valence electrons are defined as electrons occupying the highest energy level
3. The electron dot formula of $2-\mathrm{methylpentane}$ will be: