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Byju's Answer
Standard IX
Chemistry
Condensation Polymerization
Grignard reag...
Question
Grignard reagent is usually prepared by,
R
−
X
+
M
g
E
t
2
O
−
−−
→
R
M
g
X
Grignard reagent
A
r
−
X
+
M
g
E
t
2
O
−
−−
→
A
r
M
g
X
Grignard reagent
What is the correct order of reactivity of halides with magnesium?
A
R
−
C
l
>
R
−
B
r
>
R
−
I
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B
R
−
B
r
>
R
−
C
l
>
R
−
I
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C
R
−
I
>
R
−
B
r
>
R
−
C
l
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D
R
−
I
=
R
−
B
r
=
R
−
C
l
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Solution
The correct option is
C
R
−
I
>
R
−
B
r
>
R
−
C
l
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Similar questions
Q.
Choose the correct increasing order of reactivity of alkyl halides with zinc and dilute
H
C
l
.
Q.
Alkyl halides follow the reactivity sequence,
R
−
I
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R
−
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r
>
R
−
C
l
>
R
−
F
.
Q.
Consider the compounds (I) R-I (II) R-Br ; (III) R-Cl ; (IV)R-F . The rate of
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Q.
Grignard reagent is usually prepared by :
R
−
X
+
M
g
E
t
2
O
−
−−
→
R
M
g
X
Grignard reagent
A
r
−
X
+
M
g
E
t
2
O
−
−−
→
A
r
M
g
X
Grignard reagent
Grignard reagent acts as a strong base. Grignard reagent carry out nucleophilic attack in absence of acidic hydrogen. Grignard reagent form complex with its ether solvent. Complex formation with molecule of ether is an important factor in the formation and stability of Grignard reagent.
Which of the following Grignard reagents are not possible ?
Q.
In a nucleophilic substitution reaction:
R
−
B
r
+
C
l
−
D
M
F
−
−−
→
R
−
C
l
+
B
r
−
Which one of the following undergoes complete inversion of configuration?
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