Advertisements
Advertisements
प्रश्न
The preparation of alkyl fluoride from alkyl chloride, in presence of metallic fluorides is known as ______________.
पर्याय
Williamson’s reaction
Finkelstein reaction
Swarts reaction
Wurtz reaction
उत्तर
Swarts reaction
Preparation of alkyl fluorides from alkyl chlorides or bromides in presence of metallic fluorides like AgF, Hg2F2 reaction is known as Swarts reaction.
R - X + AgF → R - F + AgX
APPEARS IN
संबंधित प्रश्न
How is propene converted into 1- bromopropane and 2 - bromopropane?
Write the structure of the major product in each of the following reaction :
Write the structure of the major product in each of the following reaction :
Draw the structures of major monohalo products in each of the following reactions :
The following are the possible structural isomers expected to be formed if one of the hydrogen atoms is replaced by chlorination. The original compound is
i. (CH3)2CHCH2CH2Cl
ii. (CH3)2CHCH(Cl)CH3
iii. (CH3)2C(Cl)CH2CH3
iv. CH3CHCH2(Cl)CH2CH3
The solution of a chemical compound reacts with AgNO3 solution to form a white precipitate of Y which dissolves in NH4OH to give a complex Z. When Z is treated with dilute HNO3, Y reappears. The chemical compound X can be:
The synthesis of alkyl fluorides is best accomplished by ____________.
Gem-dibromide is ____________.
The best method for the conversion of an alcohol into an alkyl chloride is by treating the alcohol with ____________.
Conant Finkelstein reaction for the preparation of alkyl iodide is based upon the fact that:
Among the following, the most reactive towards alcoholic KOH is:
What is ‘A’ in the following reaction?
The order of reactivity of alcohols with halogen acids is ______.
(A) \[\ce{CH3CH2 - CH2 - OH}\]
(B) \[\begin{array}{cc}
\phantom{}\ce{CH3CH2 - CH - OH}\\
\phantom{...}\phantom{}|\\
\phantom{......}\ce{CH3}
\end{array}\]
(C) \[\begin{array}{cc}
\phantom{........}\ce{CH3}\\
\phantom{.....}\phantom{}|\\
\phantom{}\ce{CH3CH2 - C - OH}\\
\phantom{.....}\phantom{}|\\
\phantom{........}\ce{CH3}
\end{array}\]
Which of the following alcohols will yield the corresponding alkyl chloride on reaction with concentrated HCl at room temperature?
Which of the following is halogen exchange reaction?
Alkyl halides are prepared from alcohol by treating with ______.
(i) HCl + ZnCl2
(ii) Red P + Br
(iii) H2SO4 + KI
(iv) All the above
Alkyl fluorides are synthesised by heating an alkyl chloride/bromide in presence of ______ or ______.
(i) CaF2
(ii) CoF2
(ii) Hg2F2
(iv) NaF
Aryl chlorides and bromides can be easily prepared by electrophilic substitution of arenes with chlorine and bromine respectively in the presence of Lewis acid catalysts. But why does preparation of aryl iodides requires presence of an oxidising agent?
Discuss the role of Lewis acids in the preparation of aryl bromides and chlorides in the dark.
Match the structures given in Column I with the names in Column II.
| Column I | Column II | |
| (i) |  |
(a) 4-Bromopent-2-ene |
| (ii) |  |
(b) 4-Bromo-3-methylpent-2-ene |
| (iii) |  |
(c) 1-Bromo-2-methylbut-2-ene |
| (iv) |  |
(d) 1-Bromo-2-methylpent-2-ene |
Some alkylhalides undergo substitution whereas some undergo elimination reaction on treatment with bases. Discuss the structural features of alkyl halides with the help of examples which are responsible for this difference.
Which of the following species is an odd electron intermediate?
Iodo form can be prepared form all except
SN1 and SN2 product are same with
\[\begin{array}{cc}
\ce{Ph - CH - CH2 - CH2 ->[Zn - Cu][Δ] Product}\\
\phantom{..}|\phantom{......}|\phantom{....................}\\
\phantom{}\ce{Br}\phantom{....}\ce{Br}\phantom{..................}
\end{array}\]
Product of the above reaction is
In Finkelstein Reaction, which reactants are used?
The number of stereoisomers are possible for a compound of the molecular formula \[\ce{CH3 - CH = CH - CH(OH) - Me}\] is ______.
Write the structure of the following organic halogen compound.
1,4-Dibromobut-2-ene
