Chapter 5.4, Problem 20ATS

Interpretation Introduction

Interpretation:

To calculate the specific rotation of given molecules.

Concept Introduction:

Specific rotation: The observed rotation of optically active molecule such as non-superimposable molecule measured using the polarimeter, depends on the experimental conditions and therefore is not a characteristic property of compound.

The specific rotation can be calculated by using the formula given below.

$Specificrotation=\left[\alpha \right]{}_{\lambda }^T=\frac{\alpha }{c\times l}$

$\begin{array}{l}\text{alpha }\left(\text{α}\right)\text{ represents the observed rotation measured with a polarimeter}\text{.}\\ \text{ l represents the length of the sample tube}\text{. }\\ \text{C is the concentration of a solution of a pure sample}\text{.}\\ \text{λ is the wave length of the light}\text{.}\end{array}$

To identify: Solving the observed rotation of given molecule.