Draw a structural formula for the alkene(s) formed by treatment of each haloalkane with sodium ethoxide in ethanol.
Assume that elimination occurs by an $E_{2}$ mechanism.

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Solution

$E_{2}$ reaction.
It is a concerted one-step reaction.

The ethoxide ion abstracts the hydrogen, the simultaneously double bond is formed and halide ion leaves.

$E_{2}$ reaction is $α, β$ $- d e h y d r o h a l o g e n a t i o n$ reaction.

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Similar questions

Q. Draw structural formulas for the alkene(s) formed by treatment of each haloalkane or halocycloalkane with sodium ethoxide in ethanol. Assume that elimination occurs by an

E_{2}

mechanism.

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

Q. Elimination reactions of the following compound with sodium ethoxide give two alkenes, A and B, but with different selectivities. Which of the following statements best indicates the most probable outcome?

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.

Predict the

β -

elimination product(s) formed when each chloroalkane is treated with sodium ethoxide in ethanol. If two or more products might be formed predict which is the major product.

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Draw a structural formula for the alkene(s) formed by treatment of each haloalkane with sodium ethoxide in ethanol.Assume that elimination occurs by an E2 mechanism.

E2 reaction.It is a concerted one-step reaction.The ethoxide ion abstracts the hydrogen, the simultaneously double bond is formed and halide ion leaves.E2 reaction is α,β −dehydrohalogenation reaction.

Draw a structural formula for the alkene(s) formed by treatment of each haloalkane with sodium ethoxide in ethanol.
Assume that elimination occurs by an $E_{2}$ mechanism.

$E_{2}$ reaction.
It is a concerted one-step reaction.

The ethoxide ion abstracts the hydrogen, the simultaneously double bond is formed and halide ion leaves.

$E_{2}$ reaction is $α, β$ $- d e h y d r o h a l o g e n a t i o n$ reaction.