Chapter 19, Problem 19.47P

Interpretation Introduction

(a)

Interpretation:

The drawings of the alternative chair conformations of A should be completed. The more stable conformations should be identified.

Concept Introduction:

The carbon atoms in a ring structure can be rotated upward or downward to form different chair conformations of the same compound. These conformations are called alternative chair conformations.

Interpretation Introduction

(b)

Interpretation:

The two functional groups in B that react to form the compound A through cyclization should be identified. The new functional group formed to close the carbon ring should be identified.

Concept Introduction:

A functional group is a combination of atoms which act together to show typical chemical reactions when present in a compound.

Cyclization refers to the chemical reaction through which one or more carbon rings are formed in a compound.