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Isomerism

1-halo-2,3-di...

Question

1-halo-2,3-dimethyl butane will be obtained in better yields , if halogen is present at carbon number:

A

1

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B

2

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C

4

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D

3

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Solution

The correct option is D 1
If halogen is present on the terminal carbons, it has the same naming. Hence halogen is said to be present at $C - 1$ as shown in the above image.

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Q. Halogenation is a substitution reaction, where halogen replaces one or more hydrogens of hydrocarbon.
Chlorine free radical make

1^{\circ}, 2^{\circ}, 3^{\circ}

radicals with almost equal ease, whereas bromine free radicals have a clear preference for the formation of tertiary free radicals. So , bromine is less reactive, and more selective whereas chlorine is less selective and more effective.
The relative rate of abstraction of hydrogen by Br is

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The relative rate of abstraction of hydrogen by Cl is

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A.1 -halo -2, 3 -dimethyl butane will be obtained in better yields, if halogen is :

When 3, 3-dimethyl-2-butanol is heated with $H_{2} S O_{4}$ the major product obtained is

Q. 2,3-dimethyl butan-2-ol

H_{3} P O_{4} - --- \to

Q. Write bond line formula for 2,3-dimethyl butanal.

Q. Draw the structural formula for each of the following:

1.

2, 3

- dimethyl butane

2.

3.

Propanoic acid.

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