(d) Differentiate between asymmetry, dissymmetry and chirality
Explain why chirality is the essential condition for optical
activity ?
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The two forms are mirror images and non-superimposable. Compounds like this simple example are said to possess "handedness", or more technically, are called chiral ("handed"). One of the forms will rotate plane polarized light to the left, the other to the right. The rotations will be in the same number of degrees. In organic compounds, optical activity is the result of at least one tetrahedral carbon atom which has four different groups attached to it. Such a carbon is known variously as a stereogenic center, a chiral center or an asymmetric carbon.
Symmetric, Asymmetric and Dissymmetric molecules
Symmetric molecules: If any symmetry is present in the molecule then molecule will be symmetric molecule.
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