Quick answer: Haloalkanes are formed when a halogen replaces hydrogen on an sp³ carbon of an aliphatic hydrocarbon. In haloarenes, the halogen is directly attached to an aromatic sp² carbon. Correct IUPAC naming requires selecting and numbering the parent chain or ring, identifying halogen substituents and arranging prefixes alphabetically.
What you will learn
- Difference between haloalkanes and haloarenes
- Classification by number and position of halogens
- Allylic, benzylic, vinylic and aryl halides
- Common names and IUPAC nomenclature
- NCERT Class 12 naming practice
Video chapters
- 0:00 Lesson Introduction
- 0:32 What are Haloalkanes and Haloarenes?
- 3:21 Classification of Haloalkanes
- 7:39 Classification by sp³ and sp² Carbon
- 9:29 Aryl Halides and Haloarenes
- 12:34 IUPAC Nomenclature Rules
- 13:01 NCERT Exercise 10.1 Naming Examples
- 30:14 Advanced Nomenclature Practice
- 36:57 Lesson Recap
Important questions answered
What is a haloalkane?
It is an aliphatic compound in which one or more hydrogen atoms are replaced by halogens attached to sp³-hybridised carbon.
What is a haloarene?
It is an aromatic compound in which a halogen is directly bonded to an sp² carbon of an aromatic ring.
How are haloalkanes named in IUPAC nomenclature?
Choose the longest carbon chain, number it for the lowest substituent locants and use fluoro, chloro, bromo or iodo as prefixes.
What is the difference between geminal and vicinal dihalides?
Geminal dihalides have both halogens on the same carbon; vicinal dihalides have them on adjacent carbons.
Who should use this lesson?
This lesson is useful for school students, competitive-exam aspirants, parents supporting a learner and teachers looking for a clear explanation. Watch the complete video, make short notes and then practise the ideas without looking at the solution.
Learn with Lalit Kumar Mishra
Lalit Kumar Mishra is a chemistry educator, student success mentor, author and Founder of Topper Formula, with more than 20 years of teaching experience. Explore more learning and mentoring resources on the Resources page.