Name the following alkynes taking the cycle as the main chain.
SOLUTION:
Molecule 1.
1. Main chain: 5-membered cycle (cyclopentane)
2. Numbering: start at the carbon of the ethynyl group (alphabetically first)
3. Substituents: 1-ethynyl and 2-methyl.
4. Name: 1-ethynyl-2-methylcyclopentane
Molecule 2.
1. Main chain: 6-membered cycle (cyclohexane)
2. Numbering: assigning the minor locants to the substituents ( 1,2,4 )
3. Substituents: 1-chloro, 2-2-propynyl , and 4-methyl.
4. Name: 1-Chloro-4-methyl-2-(2-propynyl)cyclohexane
Molecule 3.
1. Main chain: 6-membered cycle (cyclohexane)
2. Numbering: assigning the minor locants to the substituents ( 1,2,4 )
3. Substituents: 1-(2-butynyl) , 2-ethyl, and 4-methyl.
4. Name: 1-(2-butynyl)-2-ethyl-4-methylcyclohexane