CameraIcon

SearchIcon

MyQuestionIcon

2

You visited us 2 times! Enjoying our articles? Unlock Full Access!

Anomalous Behaviour of Fluorine

An optically ...

Question

An optically active alcohol A $(C_{6} H_{10} O)$ absorbs 2 mol of hydrogen per mole of A upon catalytic hydrogenation and gives a product B. The compound B is resistant to oxidation by $C r O_{3}$ and does not show any optical activity. Deduce the structures of A and B.

Open in App

Solution

Compound A is unsaturated monohydric alcohol and it has either two C=C bonds or one triple bond. Compound A is optically active and after hydrogenation optically inactive compound B is obtained which is not oxidised with $C r O_{3}$ . Hence, in it $- O H$ group is attached with tertiary C-atom i.e. it is a tertiary alcohol.

Suggest Corrections

thumbs-up

0

Similar questions

Q. An optically active alcohol A

(C_{6} H_{10} O)

absorbs two moles of hydrogen per mole of A upon catalytic hydrogenation and gives a product B.The compound B is resistant to oxidation by

C r O_{3}

and does not show any optical activity.Deduce the structures of A and B.

Q. An organic compound (A) containing C, H, and O (16.32%) does not decolourise bromine water and does not give any precipitate with ammoniacal

A g N O_{3}

. It consumes 1 mol of

N H_{2} O H

per mole of (A) to give a solid derivative. The monobromo derivative of (A) shows optical activity. If (A) is optically inactive, suggest the number of hydrogen atoms present in the structure of compound (A).

Five isomeric alkenes (all positional isomers)

A

E

, all on catalytic hydrogenation with

H_{2} / P t

gives the same optically active alkane

F

. Only A and B are optically active and

A

liberate more heat on hydrogenation than

B . C

show geometrical isomerism.

E

evolves more heat on hydrogenation than

D

.

Alkene liberating least heat on hydrogenation is:

Q. An organic compound A has molecular formula

C_{8} H_{12}

and is optically active It reacts with

H_{2} / P t

B (C_{8} H_{18})

which is optically inactive Careful hydrogenation of A with

P d / B a S O_{4}

C (C_{8} H_{14})

which is still optically active Compound A reacts with Na in liquid ammonia to give Diastereomer of C, but it is optically inactive Deduce structures of A to D.

Q. An optically active hydrocarbon(X) on catalytic hydrogenation gives an optically inactive compound (Y), C

_{6}

_{14}

. The hydrocarbon (X) is-

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Anomalous Behaviour of Fluorine

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Anomalous Behaviour of Fluorine

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon