Predict all the alkenes that would be formed by dehydrohalogenation of the following halides with sodium ethoxide in ethanol and identify the major alkene:
1 -Bromo- 1 -methylcydohexane
2-Chloro-2-methylbutane
2,2,3-Trimethyl-3-bromopentane.

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Solution

According to Saytzeff's rule, in dehydrohalogenation reactions, the alkene having a greater number of alkyl groups attached to the doubly bonded carbon atom is preferably formed.

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Similar questions

Predict all the alkenes that would be formed by dehydrohalogenation of the following halides with sodium ethoxide in ethanol and identify the major alkene:

(i) 1-Bromo-1-methylcyclohexane

(ii) 2-Chloro-2-methylbutane

(iii) 2,2,3-Trimethyl-3-bromopentane.

Q. When 2-Bromo-3-methylbutane is treated with sodium ethoxide in ethanol, what will be the major product?

Q. Consider the dehydrohalogenation of

2

- b r o m o -

- m e t h y l b u t a n e

with ethoxide and

t e r t - b u t o x i d e

. Which of the following statements is true?

Q. Write the structure of the alkene formed by dehydrohalogenation of

1

-bromo-

1

-methylcyclohexane with alcoholic KOH.

Q. An alkyl chloride produces a single alkene on reaction with sodium ethoxide and ethanol. The alkene further undergoes hydrogenation to yield 2- methyl butane. Identify the alkyl chloride from amongst the following.

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Predict all the alkenes that would be formed by dehydrohalogenation of the following halides with sodium ethoxide in ethanol and identify the major alkene: 1 -Bromo- 1 -methylcydohexane 2-Chloro-2-methylbutane 2,2,3-Trimethyl-3-bromopentane.

According to Saytzeff's rule, in dehydrohalogenation reactions, the alkene having a greater number of alkyl groups attached to the doubly bonded carbon atom is preferably formed.

Predict all the alkenes that would be formed by dehydrohalogenation of the following halides with sodium ethoxide in ethanol and identify the major alkene:
1 -Bromo- 1 -methylcydohexane
2-Chloro-2-methylbutane
2,2,3-Trimethyl-3-bromopentane.