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Addition Reactions

A chiral hydr...

Question

A chiral hydrocarbon A(C $_{5}$ H $_{8}$ ) on catalytic hydrogenation is rendered achiral. Hence, A could be :

A

1-methyl cyclobutene

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B

3-methyl cyclobutene

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C

1,2-dimethyl cyclopropene

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D

2,4-dimethyl-2-hexene

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Solution

The correct option is B 3-methyl cyclobutene
( since it has plane of symmetry through methyl group )

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Similar questions

Q. A hydrocarbon

A (C_{5} H_{8})

on catalytic hydrogenation produces B. Hence, B could be

Q. From the list of alkenes given below, identify the alkenes which on ozonolysis give only ketones.
(a) 2 methyl-1-butene
(b) 1-butene
(c) 2,3-dimethyl-2-butene
(d) 3-methyl-2-pentene
(e) 3,4-dimethyl-3- hexene
(f) 2,5-dimethyl-2,4-hexadiene

Q. From the list of alkenes given below, identify the alkenes which on reductive ozonolysis given only ketones.
(a) 2-methyl-1-butene
(b) 1-butene
(c) 2,3-dimethyl-2-butene
(d) 3-methyl-2-pentene
(e) 3,4-dimethyl-3-hexene
(f) 2,5-dimethyl-2,4-hexadiene

Q. Consider the heterogeneous catalytic hydrogenation of cis

- 3, 4

3

-hexene. What is stereo-chemical outcome of the reaction?

Q. Assertion :When

c i s - 3, 4 - d i m e n t h y l - 3 - h e x e n e

is hydrogenated in presence of a Ni catalyst, a

m e s o

hydrocarbon is obtained, However, when

t r a n s - 3, 4 - d i m e t h y l - 3 - h e x e n e

is hydrogenated with Ni catalyst, a racemic mixture of product is obtained Reason: Catalytic hydrogenation occur in syn orientation

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