- Name compounds containing a double bond and an alcohol group as alkenols (or
cycloalkenols) and give the alcohol carbon the lower number.
CH 3 CCH 3
CHCHCH 3
OH5 4 3 2 1OH(^12)
3
CH 3
4-Methyl-3-penten-2-ol 2-Methyl-2-cyclohexen-1-ol
- The vinyl group and the allyl group.
H^2 CCH H^2 CCHCH^2
The vinyl group The allyl group
CC
BrHHH
CC
CH 2 ClHHHBromoethene or 3-Chloropropene or
vinyl bromide (common) allyl chloride (common)
- Cis- and trans-alkenes:.
CC
ClHClH
CC
ClHHClcis-1,2-Dichloroethene trans-1,2-Dichloroethene
4.6 NOMENCLATURE OF ALKYNES
- Alkynes are named in much the same way as alkenes ⇒ replacing -ane to -yne.
- The chain is numbered to give the carbon atoms of the triple bond the lower
possible numbers.
- The chain is numbered to give the carbon atoms of the triple bond the lower