Multiple Choice

$$RX\, +\, Mg\, \xrightarrow{Ether}\, RMgX\, \xrightarrow{CH_3OH}\, n- Butane$$ What can be $$R$$ in the above reaction sequence?

An-Butyl
Correct Answer
Bsec-Butyl
Correct Answer
Cn-Propyl
DIsopropyl

Solution

$$CH_3-CH_2-CH_2-CH_2-MgBr + CH_3OH \longrightarrow CH_3-CH_2-CH_2-CH_3 + CH_3OMgBr$$

In this reactions the Grignard reagent acts as base while methanol release acidic H so acid base reaction takes place.

So R can be both A and B which will give n-butane.

While in option C and 3 carbon atoms which won't give n-butane as a product,

Option A and B both are correct.

SIMILAR QUESTIONS

Haloalkanes and Haloarenes

Which of the following can give a Grignard reagent when reacted with magnesium in dry ether ?

Haloalkanes and Haloarenes

Provide the structure of compound $$A$$ in the following reaction.

Haloalkanes and Haloarenes

The best yield of given product can be obtained by using which set of reactants $$X$$ and $$Y$$?

Haloalkanes and Haloarenes

Which of the following does not form Grignard reagent on reaction with $$Mg$$ in the presence of ether?

Haloalkanes and Haloarenes

An example of a sigma bonded organometallic compound is:

Haloalkanes and Haloarenes

An allylide on hydrolysis gives allylene. The alkaline earth metal cation of allylide dissolves in dry ether in the presence of alkyl halide to form Grignard reagent. The allylide is :

Haloalkanes and Haloarenes

In the following reaction, $$C_{6}H_{5}CH_{2}Br \underset {(ii)H_{3}O^{+}}{\xrightarrow {(i) Mg, Ether}} X$$, the product $$'X'$$ is:

Haloalkanes and Haloarenes

The final product obtained in the reaction is:

Haloalkanes and Haloarenes

Grignard reagent is prepared by the reaction between:

Haloalkanes and Haloarenes

The best yield of given product can be obtained by using which set of reactants $$X$$ and $$Y$$?

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