Chapter 20.12, Problem 19P

Interpretation Introduction

Interpretation:

The resonance contributing structure of the thymine is to be drawn. The evidence that supports the statement that the thymine follows the Hückel’s rule is to be explained.

Concept introduction:

A molecule that is cyclic, planar, completely conjugated and follows Huckel’s rule is classified as an aromatic compound.

Aromatic compounds follow Huckel’s rule of $\left(4n+2\right)\text{π}$ electrons.

A ring that contains six or ten $\text{π}$ electrons acts as an aromatic ring.

The stability of a compound depends upon the number of resonating structures.