Home
Class 12
CHEMISTRY
Iodoform is obtained by the reaction of ...

Iodoform is obtained by the reaction of acetone with hypoiodite but not with iodide I on. Explain.
(b) Optically active 2-iodobutane on treatment with Nal in acetone gives a product which does not show optical activity. Why?

Text Solution

Verified by Experts

(a) To prepare iodoform from acetione. I* ion is required which is furnished by IO but not by I as shown below

(b) Optically active 2-iodobutane on treatment with Nal in acetone undergoes racemization and hence the product does not show optical activity.
Promotional Banner

Similar Questions

Explore conceptually related problems

Optically active 2-iodo butane on treatment with NaI in acetone gives a product which does not show optical activity. Explain briefly.

Give reasons: iodoform is obtained by the reaction of acetone with hypoiodite but not with iodide ion.

Which of the following does not show optical activity ?

Give the reasons for the following: (i) Iodoform is prepared by reacting acetone with hypoiodite and not with idodine. Explain. (ii) Halogen acids readily combine with alkene to form addition products but fail to react with carbonyl compounds. Discuss.

What is the optical nature of the product obtained in an S_(N^1) reaction if the substrate is optically active ?

The compound Co(en)_(2)(NO_(2))_(2)CI has been prepared in these isomeric forms A,B and C A does not react with AgNO_(3) or (en) and is optically inactive B reacts with AgNO_(3) but not with (en) and is optically inactive C is optically active and reacts with both AgNO_(3) and (en) identify each of these isomeric forms and draw their structures .

Optically active isomer (A) of (C_(5)H_(9)Cl) on treatment with one mole of H_(2) gives an optically inactive compound (B) compound (A) will be :

Give the structure of an optically active alkene (A) having the lowest molecular mass, which on catalytic hydrogenation gives an optically inactive compound (B) .

Carbene intermediates are produced by the photolysis of diazomethane (CH_2N_2) or kenene (CH_2 = C = O) . They are also produced by the reaction of CHX_3 with base or by Simmons-Smith reaction. There are two types of carbenes, singlet and triplet. They are so called due to their spin state. An optically active alkene (I) with lowest molecular mass on hydrogenation gives optically inactive alkene, but on insertion of methylene carbene ( : CH_2) in (I) , it gives optically active compound (II) . The compounds (I) and (II) are : .