ALKYnes sem 1: 2011/2012. Khadijah Hanim bt Abdul Rahman School of Bioprocess Engineering, UniMAP Week 5: 13/10/2011 email@example.com. Learning outcomes. Structure, nomenclature and naming alkynes DEFINE and ILLUSTRATE the principle in naming alkynes on few examples
KhadijahHanimbt Abdul Rahman
School of Bioprocess Engineering, UniMAP
Week 5: 13/10/2011
- EXPLAIN and DISCUSS the reactivity of alkynes in electrophilic addition reaction.
Few drugs on the market that contain alkyne functional groups- not naturally occuring
If the 2 functional groups are a double bond and triple bond, chain is numbered to produce a name containing the lower no., regardless of which functional group gets the lower no.
If the same low no is obtained in both directions, the chain is numbered in the direction that gives the double bond the lower no.
If the 2nd functional group suffix has a higher priority than the alkene suffix, the chain is numbered in the direction that assigns the lower no to functional group with higher-priority suffix.
Alkyne has higher boiling point than an alkene with the same no of carbons.
The triple bond is formed by each of the 2 p orbitals on 1 sp carbon overlapping the parallel p orbital on the other sp carbon to form 2 π bonds.
A triple bond is composed of a s bond and two p bonds
Carbon-carbon triple bond is shorter and stronger than carbon-carbon double bond