Organic chemistry - Chapter 5: Alkene - Nam Phan
The IUPAC name of an alkene is obtained by replacing
the “ane” ending of the corresponding alkane w
Ethylene is an acceptable synonym for ethene in the IUPAC
system
• Propylene, isobutylene and other common names ending in
“ylene” are NOT acceptable IUPAC name
the “ane” ending of the corresponding alkane w
Ethylene is an acceptable synonym for ethene in the IUPAC
system
• Propylene, isobutylene and other common names ending in
“ylene” are NOT acceptable IUPAC name
42 trang
02/01/2023
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Nội dung text: Organic chemistry - Chapter 5: Alkene - Nam Phan
- Chapter 5: ALKENES An sp2 hybridized carbon 2
- Determine the parent hydrocarbon – the longest continuous carbon chain containing the C=C 4
- PREPARATION OF ALKENES Dehydrations of alcohols Acid isomerization 6
- Eliminations of alkyl halides Base 8
- REACTIONS OF ALKENES Additions of hydrogen halides (AE) More stable Markovnikov’s rule 10
- 12 More stable
- Already has 1 asymmetric carbon 14
- Additions of hydrogen bromide (AR ) Electrophilic addition (AE) Radical addition (AR ) – only for HBr 16
- Additions of halogens 18
- Stereochemistry 20
- Stereochemistry 2 asymmetric carbons are created Trans-2-butene Æ meso compound 22
- Reaction mechanism: Carbocation rearrangement might occur 24
- Additions of borane: hydroboration-oxidation 26
- Additions of hydrogen – hydrogenation 28
- Stereochemistry 30
- Alkene epoxidations – Anti hydroxylations 32
- Reactions of epoxides 34
- Stereochemistry Anti additions 36
- Reaction mechanism: Syn additions 38
- Ozonolysis of alkenes 40
- Polymerizations 42
