You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Chemistry

Introduction to Optical Isomerism

Consider the ...

Question

Consider the given structures $(A), (B), (C)$ and $(D)$ .

Which of the following statements is not correct?

B

and

C

are identical

No worries! We‘ve got your back. Try BYJU‘S free classes today!

A

and

B

are enantiomers

No worries! We‘ve got your back. Try BYJU‘S free classes today!

A

and

C

are enantiomers

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

and

D

are enantiomers

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D $B$ and $D$ are enantiomers
B and D are two molecules of the same compound as they have same molecular formula and same arrangement of groups in three dimensions.

Suggest Corrections

Similar questions

Q. Under the specified conditions, substrate

X

undergoes substitution and elimination reactions to give products

A - D

A

and

B

are stereoisomers, but not enantiomers.

C

and

D

are enantiomers. A is not an isomer of

C

. Which of the following could be the material

X

X H_{2} O - - \to Δ A + B + C + D

Q. An organic compound

A (C_{5} H_{10} O_{2})

reacts with

B r_{2}

in presence of phosphorus to produce

B

which can be resolved into enantiomers.

B

on dehydrobromination yields

C (C_{5} H_{8} O_{2})

which does not show stereoisomerism.

C

on decarboxylation gives an alkene which on further ozonolysis gives

D

and

E

D

gives Schiff's test but

E

does not. The correct identity of these compounds are:

A schematic analysis of the reaction of one enantiomer with racemic mixture is shown below

\begin{matrix} d & + & d a n d l & \to & (d) - (d) T h e (+) f o r m o f & A r a c e m i c m i x t u r e o f & + c h i r a l m o l e c u l e s & o t h e r m o l e c u l e s w i t h & (d) - (l) 50 % (d) a n d 50 % (l) \end{matrix}

The products (d-d) and (d-l) are clearly neither identical nor enantiomers (non-superimposable mirror images) as the mirror image of (d-d) is (l-l) not (d-l). They are diastereomers, 'stereoisomers that are not mirror images'.

The formation of diastereomers allows the separation of enantiomers (called resolution) which is not easy as enantiomers have identical physical properties. One general procedure for separating enantiomers is to allow them to react with naturally occurring chiral molecule to form a pair of diastereomers. These can be separated easily as they have different physical properties. if the original chemical reaction can be reversed, the enantiomers can be isolated.

Which of the following is an example of diastereomers?

Q. Define (a) Optical activity
(b) Asymmetric carbon atom
(c) Enantiomers
(d) Racemates.

Q. The correct sequence of relationships between the compounds of pairs (i) - (iv) respectively is:

Join BYJU'S Learning Program

Consider the given structures (A),(B),(C) and (D).Which of the following statements is not correct?

The correct option is D B and D are enantiomersB and D are two molecules of the same compound as they have same molecular formula and same arrangement of groups in three dimensions.

Consider the given structures $(A), (B), (C)$ and $(D)$ .

Which of the following statements is not correct?

The correct option is D $B$ and $D$ are enantiomers
B and D are two molecules of the same compound as they have same molecular formula and same arrangement of groups in three dimensions.