Chapter 2.6, Problem AQ

Interpretation Introduction

Interpretation:

The relationship between the boxed atom and the circled atoms in the given structure has to be given.

Concept Introduction:

Cis, Trans Isomerism in Bicycloalkanes:

Depending on the orientation of two hydrogen atoms at the ring junction, whether the hydrogens are cis or trans to each other, two stereoisomers are possible for bicycloalkanes.

Example: Decalin:

Figure 1

Since both the ring in bicycloalkane is locked into one chair conformation, neither ring can invert to its alternative chair and thus the other substituent on ring which would be in equatorial position will remian equatorial and the substituent which would be in axial position will remain axial.