The order of reactivity of phenyl magnesium bromide $(P h M g B r)$ with the following compounds:

III > II > I

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II > I > III

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I > III > II

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I > II > III

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Solution

The correct option is D I > II > III
The order of reactivity of phenyl magnesium bromide (PhMgBr) with the following compounds is represented as $I > I I > I I I$ .As the number of alkyl groups increases or the size of the alkyl groups increases, the steric crouding increases and the ease of the nucleophilic attack of the grignard reagent on the carbonyl carbon decreases.

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Similar questions

Q. The order or reactivity of phenyl magnesium bromide with the following compounds is:

(I)

C H_{3} - O | | C - C H_{3}

(II)

H - O | | C - C H_{3}

(III)

P h - O | | C - P h

Q. What will be the reactivity order of following compounds with

P h M g B r

?
(I)

C H_{3} C H O

(II)

P h C H O

(III)

C H_{3} C O P h

(IV)

H C H O

Mark the correct increasing order of reactivity of the following compounds with HBr / HCl.

(a) I < II < III
(b) II < I < III
(c) II < III < I
(d) III < II < I

Q. The correct order of reactivity of

P h M g B r

towards
(I) Benzophenone (II) Acetaldehyde (III) Acetone
is:

Q. Consider the following chlorides:

The correct order of

S_{N} 1

reactivity is

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The order of reactivity of phenyl magnesium bromide (PhMgBr) with the following compounds:

The order of reactivity of phenyl magnesium bromide $(P h M g B r)$ with the following compounds: