Question

Which of the following alcohols has tertiary allylic carbon?

Options

• But-3-en-2-ol

• Prop-2-en-l-ol

• 2-Methylbut-3-en-2- ol

• l-Phenyl ethanol

Answer 1

2-Methylbut-3-en-2- ol

Explanation:

But-3-en-2-ol	\[\begin{array}{cc} \phantom{......}\ce{OH}\\ \phantom{.....}|\\ \ce{H2C = \underset{\text{2°alcohol}}{CH - CH} - CH3}\end{array}\]
Prop-2-en-l-ol	\[\begin{array}{cc} \ce{H2C - HC = CH2}\\ |\phantom{...........}\\ \ce{\underset{\text{1°alcohol}}{OH}}\phantom{.......}\end{array}\]
2-Methyl but-3-en-2-ol	\[\begin{array}{cc} \phantom{........}\ce{CH3}\\ \phantom{......}|\\ \ce{H2C - CH - C - CH3}\\ \phantom{......}|\\ \phantom{...........}\ce{\underset{\text{3° allyl alcohol}}{OH}}\end{array}\]
1-phenyl ethanol