Study elimination reactions and interactions of haloalkanes with metals and other reagents. Includes practice questions and detailed explanations for exam preparation.
Wurtz reaction of (CH₃)2CHCH₂Cl (1-chloro-2-methylpropane) forms (CH₃)2CHCH₂CH₂CH(CH₃)2 (2,5-dimethylhexane), a branched six-carbon alkane.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Elimination Reactions and Reaction with Metals and Other Reactions
For 1-butene ( CH₃CH₂CH=CH₂ ), HI adds via Markovnikov's rule, forming CH₃CH₂CHICH₃ (2-iodobutane).
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Elimination Reactions and Reaction with Metals and Other Reactions
CH₃CH₂CH₂CH₂Br forms a Grignard reagent ( CH₃CH₂CH₂CH₂MgBr ), which hydrolyzes to pentane ( CH₃CH₂CH₂CH₂CH₃ ).
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Elimination Reactions and Reaction with Metals and Other Reactions
This is a Wurtz reaction, coupling two CH₃CH₂CH₂Cl molecules to form CH₃CH₂CH₂CH₂CH₂CH₃ (hexane).
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Elimination Reactions and Reaction with Metals and Other Reactions
Alcoholic KOH (in methanol) promotes elimination (E₂) in CH₃CH₂CH₂Br , forming CH₃CH=CH₂ (propene).
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Elimination Reactions and Reaction with Metals and Other Reactions
NaOCH₃ in methanol substitutes I in CH₃CH₂I via SN₂ , forming CH₃CH₂OCH₃ (ethyl methyl ether).
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Elimination Reactions and Reaction with Metals and Other Reactions
This is a Wurtz reaction variant. CH₃CH₂Cl and CH₃Cl couple with Na to form CH₃CH₂CH₃ (propane) as one product.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Elimination Reactions and Reaction with Metals and Other Reactions
This is a Wurtz reaction, coupling two CH₃CH₂CH₂CH₂Cl molecules to form CH₃CH₂CH₂CH₂CH₂CH₂CH₂CH₃ (octane).
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Elimination Reactions and Reaction with Metals and Other Reactions
CH₃CH₂CH₂Br forms CH₃CH₂CH₂MgBr with Mg , which hydrolyzes with H₂O to CH₃CH₂CH₃ (propane).
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Elimination Reactions and Reaction with Metals and Other Reactions
Wurtz reaction couples two CH₃CH₂Cl (2 carbons each) to form butane ( CH₃CH₂CH₂CH₃ ), with a 4-carbon chain.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Elimination Reactions and Reaction with Metals and Other Reactions
CH₃CH₂CH₂CH₂CH₂I reacts with excess NH₃ via SN₂ to form CH₃CH₂CH₂CH₂CH₂NH₂ (pentylamine) after heating.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Elimination Reactions and Reaction with Metals and Other Reactions
A geminal dihalide has two halogens on the same carbon. CH₃CH₂CCl₂CH₃ (2,2-dichlorobutane) is geminal.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Elimination Reactions and Reaction with Metals and Other Reactions
