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Amines are basic in nature and show many...

Amines are basic in nature and show many types of reactions such as substitution, Hoffmann elimination, carbylamine, acylation, diazotisation etc.

X is same as

A

A

B

B

C

C

D

D

Text Solution

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The correct Answer is:
B
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Amines are basic in nature and show many types of reactions such as substitution, Hoffmann elimination, carbylamine, acylation, diazotisation etc. What is the major alkene formed in the following Hoffmann elimination?

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How many of the following amines can give carbylamine reaction

Type of elimination reaction in which least substituted alkene is major product known as Hofmann's elimination. Such reaction occur in following conditions : (X) when base is bulky (Y) when leaving group is very poor such as fluoride, ammonium group (-overset(oplus)NR_(3)) etc. (Z) when alkyl halide contain one or more double bonds. Which of the following will not produce Hofmann's alkene as major product on reaction with strong base?

It is believed that chloroform and hydroxide ion react to produce an electron deficient intermediate dichlorocarbene : C Cl_(2) (DC C) Treatment of phenol with DCC in basic medium introduces an aldehyde group, onto the aromatic ring. This reaction is known as Reimer Tiemann reaction. The Reimer-Tiemann reaction involves electrophilic substitution on highly reactive phenoxide ring The electrophilic reagent is dichloro carbene : C Cl_(2) . o-product is major product because : (i) There are two o-positions available as compared to one para. (ii) o-product is more stable due to the formation ofsix membered chelate formation. If 1^(@) amines (aliphatic and aromatic) react with DCC in basic medium it yield isocyanide or carbylamine. The reaction is known as carbylamine reaction. The product is known as isocyanide & it is a foul smelling substance. Step marked by * is :