10 public questions tagged with this topic.
Aryl halides resist nucleophilic substitution due to resonance stabilization of the C-X bond. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Some Basic Concepts, Structure of Atom and Periodicity, Topic: Mole concept, atomic models and periodic trends.
Tertiary halides react the slowest in S_N₂ reactions due to steric hindrance. This follows from NCERT principle where relation explains outcome clearly for students.
Ref: NCERT Chemistry Textbook for Class XI and XII, Chapter: Some Basic Concepts, Structure of Atom, Periodicity and relevant Chemistry topic, Topic: Mole concept and periodic trends.
A vicinal dihalide has halogens on adjacent carbons. CH₃CHBrCH₂Br (1,2-dibromopropane) is a vicinal dihalide.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Polyhalogen Compounds - Chloroform Iodoform DDT Freons
Density increases with molecular weight for similar structures. CH₃CH₂CH₂I (1-iodopropane) has the highest molecular weight.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Physical Properties - Boiling Point Dipole Moment Solubility
Bond enthalpy increases with smaller halogen size due to stronger overlap. CH₃F has the highest C-X bond enthalpy.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Nature of C-X Bond and Methods of Preparation
Bond enthalpy decreases as the halogen size increases due to weaker overlap. CH₃-I has the weakest C-X bond among F, Cl, Br, and I.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Nature of C-X Bond and Methods of Preparation
A benzylic halide has the halogen on a carbon directly attached to a benzene ring. C₆H₅CH₂Cl (benzyl chloride) fits this definition.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Nature of C-X Bond and Methods of Preparation
Aqueous KOH substitutes Cl in CH₃CHClCH₂CH₂CH₃ (2-chloropentane) via SN₂ to form 2-pentanol ( CH₃CH(OH)CH₂CH₂CH₃ ).
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Nature of C-X Bond and Methods of Preparation
A primary halide has the halogen on a carbon bonded to one other carbon. CH₃CH₂CH₂CH₂Br (1-bromobutane) is primary.
Ref: NCERT Class 12 Chemistry > Chapter 6: Haloalkanes and Haloarenes > Topic: Nature of C-X Bond and Methods of Preparation
