Q.26. - Organic Chemistry

Question

Question: Locate the isoprene units in each compound.

Step-by-Step Solution

Answer

Answer

Step 1: Isoprene units

Isoprene units are compounds with a formula $\mathit{C}{\mathit{H}}_{\mathbf{2}}\mathbf{=}\mathit{C}\left(C{H}_3\right)\mathbf{-}\mathit{C}\mathit{H}\mathbf{=}\mathit{C}{\mathit{H}}_{\mathbf{2}}$  consisting of double bonds and five carbons. The simplest ones are the monoterpenes containing two isoprene units.

Step 2: Isoprene units in each compound

a. In the neral compound, there are two isoprene units.

neral

 

b. In the carvone compound, there are two isoprene units.

carvone

c. In the lycopene compound, there are eight isoprene units.

lycopene

d. In the $\beta -carotene$ compound, there are eight isoprene units.

   $\beta -carotene$

Step 3: Isoprene units in each compound

e. In the patchouli alcohol compound, there are three isoprene units.

patchouli alcohol

 

f. In the periplanone B compound, there are three isoprene units.

periplanone B

g. In a dextropimaric acid, there are four isoprene units.

dextropimaric acid

h. In $\beta -amyrin$ , there are six isoprene units.

$\beta -amyrin$