Chapter 5, Problem 5.30P

Interpretation Introduction

Interpretation:

Measured angle of rotation for penicillin V is to be calculated.

Concept introduction:

Measured angle of rotation is the angle by which, “the chiral compound rotates the plane-polarized light”. The formula for it is:

$\text{α = }\left({\left[\text{α}\right]}_{\text{λ}}^{\text{T}}\right)\left(\text{l}\right)\left(\text{c}\right)$

Where $\text{α}$ is the measured angle of rotation, l is the length of the sample tubes in the unit decimeters (dm), c is the concentration of sample in the units of grams per milliliter (g/mL) and the term $\left({\left[\text{α}\right]}_{\text{λ}}^{\text{T}}\right)$ is the specific rotation that is used to calculate the measured angle of rotation.