Name: Diastereomers and Meso Compounds
Uploaded: 2019-07-19
Duration: 10 min 31 s
Description: Here, we will see how compounds with multiple stereocenters may be achiral if they have an internal plane of symmetry or an inversion centre. Let's explore.

Question

( $i$ ) Total number of fractions on fractional distillation of $I,$ $I I$ and $I I I$ .
( $i i$ ) Optical active compounds.
( $i i i$ ) Relation between $I$ and $I I$ .
( $i v$ ) Relation between $I$ and $I I I$ .

Accepted Answer

The given molecules (I) and (II) are mirror image to each other and molecules (I) and (III) are identical molecule.

An enantiomer is one of two stereoisomers that are mirror images of each other that are non-superposable. Enatiomers can not be separated by distillation method.

( $i$ ) Total number of fractions on the fractional distillation of all stereoisomer will be one.

In the distillation method, the pair of enantiomers can not separate, therefore, out of three, here, one pairs of enantiomers are present which can not be separated.

( $i i$ ) Optical active compound which can rotate plane polarised light. If the compound does not have plane of symmetry, then this will be optically active.

Here, total all three isomers are optically active.

( $i i$ ) Compound $i i i$ and $II$ are mirror images to each other, therefore, this will be the pair of enantiomers.

( $i v$ ) Compound $I$ and $III$ are identical molecules because there are no changes present.

( $i$ ) Total number of fractions on fractional distillation of $I,$ $I I$ and $I I I$ .
( $i i$ ) Optical active compounds.
( $i i i$ ) Relation between $I$ and $I I$ .
( $i v$ ) Relation between $I$ and $I I I$ .

Important Questions on Organic Chemistry- Some Basic Principles and Techniques

Learn and Prepare for any exam you want !

(i) Total number of fractions on fractional distillation of I, II and III. (ii) Optical active compounds. (iii) Relation between I and II. (iv) Relation between I and III.

Important Questions on Organic Chemistry- Some Basic Principles and Techniques

Learn and Prepare for any exam you want !

( $i$ ) Total number of fractions on fractional distillation of $I,$ $I I$ and $I I I$ .
( $i i$ ) Optical active compounds.
( $i i i$ ) Relation between $I$ and $I I$ .
( $i v$ ) Relation between $I$ and $I I I$ .