CHEM 1A03 Lecture Notes - Lecture 2: Dehydrogenation, Substituent, Aliphatic Compound

• School: McMaster University
• Department: Chemistry
• Course: CHEM 1A03
• Professor: David Brock

Document Summary

Many structural isomers: identical molecules, but with different attachments. The single (saturated) bond is not considered a functional group. Number c#1 at end closest to r- or x substituent. Generally alkanes are not very reactive. double bonds (unsaturated) Name longest chain; number end closest to c=c. Many structural and geometric isomers( cis-, trans-) (olefins) Dehydrogenation and more halogen substitution on saturated c. Name based on number of c-c in the ring. With 2 or more substituents, number the ring positions to give the lowest set of numbers: cyclopentane, cyclopentene, methylcyclohexane, 1,2,4-trimethyl hexane, 1-chloro-2,5- dimethylcyclohexane (not 1-chloro-3,6- dimethylcyclohexane) Based on the benzene portion of the molecule: methylbenzene. Phenols form their own classification as in d which is named 4-bromophenol. When the emphasis is on the functional group, the prefix benz-is used as in e. benzaldehyde and: benzoic acid. Do not use the cyclo-prefix: benzene, methyl benzene (toluene, hydroxybenzene, but more commonly known as phenol, combustion, substitution only, no addition on ring.