1. Section 5 Acetylenes from Alkyls, Methylenes and Aryls

2. Section 5 Acetylenes from Alkyls, Methylenes and Aryls

3. Ammonia are Acidyls in place of alkyls: N^j- CH ' ; N^ caCH ' )2 ; N(CO.CH 3 ) 3

4. The Antiknock additives, which have been widely used worldwide, are the lead alkyls tetraethyl lead (TEL) and tetramethyl lead (TML)