wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Byju's Answer
Standard XII
Chemistry
Addition of Sulphuric Acid and Water
For the above...
Question

For the above series of reaction, what can be predicted about stereochemistry of final product?

230912.jpg

A
meso compound
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
a chiral compound
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
racemic mixture
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
a pair of diastereomers
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C racemic mixture
For the given series of reaction, final product is a racemic mixture. The C≡C triple bond of 2-butene is selectively reduced to cis C=C double bond by hydrogen gas in presence of Lindlar's catalyst to obtain cis-3-butene. Anti addition of bromine to cis-2-butene gives racemic mixture of dibromides.

flag
Suggest Corrections
thumbs-up
0
similar_icon
Similar questions
Q.

The correct statement(s) about the following compound
H3C(OH)HC−CH=CH−CH(OH)CH3(X) is/are:


Q. Match the compounds/reactions in List I with their stereochemistry in List II. Matching can be one or more than one.
Q. Match the compounds in Column I with their characteristics/tests/reactions (s) reagent(s)/stereochemistry/isomer(s) given in Column II. Matching can be one or more than one.
Column IColumn II
ReactionProduct and name of the reaction
Q.
A schematic analysis of the reaction of one enantiomer with racemic mixture is shown below
d+dandl→(d)−(d)The(+)formofAracemicmixtureof+chiralmoleculesothermoleculeswith(d)−(l)50%(d)and50%(l)

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. Trans−3,6−dimethyloct−4−ene (A) exists in two diastereomers (I) and (II). Which statement is true about (I) and (II)? If the stereochemistry about the double bond in (A) is cis-, the total number of stereoisomers for (A) is:
248207_7a4ec1bf5d934bceb276f08ee2cabc20.png
View More
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Alkenes - Chemical Properties
CHEMISTRY
Watch in App
explore_more_icon
Explore more
Addition of Sulphuric Acid and Water
Standard XII Chemistry
Join BYJU'S Learning Program
book_image
AI Tutor
book_image
Textbooks
book_image
Question Papers
book_image
Install app
CrossIcon