Chapter 16, Problem 16.72P

Interpretation Introduction

(a)

Interpretation:

The acetal in salicin should be labeled.

Concept Introduction:

Addition of one molecule of alcohol to an aldehyde or ketone results in a hemiacetal. Here, the C=O double bond breaks and single bonds are formed. If the hemiacetal is acyclic, it is not stable. Acyclic hemiacetal reacts with a second alcohol molecule and forms acetal.

Interpretation Introduction

(b)

Interpretation:

Number of primary OH groups salicin contains should be determined.

Concept Introduction:

A primary OH group is a hydroxyl group which is attached to a primary C atom. Primary C atom has two H atoms attached to it along with one alkyl/aryl group.