91Ó°ÊÓ

Each pi-bond has one element of unsaturation and each ring has one element of unsaturation. The pi- bond comprises of one double bond and the triple bond comprises of two double bonds.

The structures of cicutoxin, capillin, and panaxytriol are represented as:

Cicutoxin

Capillin

Panaxytriol

The two structural formulas for ${\text{C}}_{\text{5}}{\text{H}}_{\text{8}}$are:

${\mathrm{CH}}_3−\mathrm{C}≡\mathrm{C}−{\mathrm{CH}}_2−{\mathrm{CH}}_3$

Pent-2-yne

$\mathrm{CH}≡\mathrm{C}−{\mathrm{CH}}_2−{\mathrm{CH}}_2−{\mathrm{CH}}_3$

Pent-1-yne

The two structural formulas for ${\mathrm{C}}_8{\mathrm{H}}_{10}$are:

Meta-xylene

Ethyl benzene

The two structural formulas for ${\mathrm{C}}_9{\mathrm{H}}_{12}$ are:

Cumene

(Isopropyl benzene)

Cumene

(Propyl benzene)