Question

What's the difference between external compensation and internal compensation
?

Answer 1

Answer:

is known as internal compensation. In case of racemic mixtures, which are 50-50percent mixtures of enantiomers , the net rotation is zero , because rotation of one enantiomer is always compensated by rotation of another enantiomer , thus it is known as external compensation.

Answer 2

The difference between external compensation and internal compensation are :

• External compensation is due to optical inactivity of a solution due to the presnce of equal amounts of two enantiomers.
• Enantiomers rotate plane polarized light in opposite directions by the same magnitude.
• Internal compensation is the optical inactivity of a solution due to presence of a compound which is of meso type.
• Meso type compounds are those which contains more than one optically active centre which cancels out each others active.