1. ALKYNES

2. Alkynes
Alkynes are hydrocarbons containing triple bonds
CnH2n-2

3. Physical Properties of Alkynes
Not soluble in water.
They are quite soluble in the usual organic solvents of low polarity
Their density less than water.
Their boiling points increase as the number of carbons increases.
First four members are gases higher alkynes are liquids or solids.

4. Preparation of Alkynes
Dehydrohalogenation of alkyl dihalides

5. Reactions of metal acetylides with primary alkyl halides

6. Reaction of water with calcium carbide

7. Reactions of Alkynes
Addition reactions
Addition of hydrogen

8. Addition of halogens

9. Addition of halogens

10. Addition of hydrogen halides

11. Oligomerization

12. Aromatic Hydrocarbons
Aromatic compounds are benzene and benzene like compunds in terms of chemical behaviour

13. Nomenclature of benzene derivatives
chlorobenzene
nitrobenzene

14. Aniline
Amino benzene
Toluene
Methyl benzene

15. Phenol
Benzoic acid

16. Benzenesulphonic acid