Download alkanones

Survey
yes no Was this document useful for you?
   Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Document related concepts

Alkene wikipedia, lookup

Hydroformylation wikipedia, lookup

Strychnine total synthesis wikipedia, lookup

Alcohol wikipedia, lookup

Wolff–Kishner reduction wikipedia, lookup

Asymmetric induction wikipedia, lookup

Elias James Corey wikipedia, lookup

Nucleophilic acyl substitution wikipedia, lookup

Baylis–Hillman reaction wikipedia, lookup

Aldol reaction wikipedia, lookup

1,3-Dipolar cycloaddition wikipedia, lookup

Metal carbonyl wikipedia, lookup

Kinetic resolution wikipedia, lookup

Carbohydrate wikipedia, lookup

Wolff rearrangement wikipedia, lookup

Transcript
Our Plan For Today
Aim: We are going to learn about the structures
of aldehydes and ketones and how to name them.
• Recap on oxidation of alcohols
• Aldehydes (alkanals) and Ketones
(alkanones)
• Naming aldehydes and ketones.
Recap on Oxidation of Alcohols
• Oxidised by acidified potassium dichromate.
• The alcohol is oxidised to form an aldehyde
which is a member of the alkanal homologus
series.
[O]

ethanol
+ H2O
ethanal
Secondary Alcohols
• Oxidised by acidified potassium dichromate.
• When a secondary alcohol is oxidised a ketone
is produced, they belong to the homologus
series, the alkanones.
[O]

propan-2-ol
+ H2O
propanone
Tertiary Alcohols

Tertiary alcohols
are not readily
oxidised
Aldehydes - Alkanals
carbonyl group
butanal
Aldehydes can be categorised by the presence
of a C=O known as a carbonyl group.
In an aldehyde the carbonyl group (C=O) is at
the end of a carbon chain.
They are a member of a homologus series called
the alkanals, which ends in –anal.
Naming Alkanals
H CH3 H H O
5
4
3
2
1
H–C–C–C–C–C–H
4-methylpentanal
H H H H
Number your carbons from the carbonyl end.
Name any branches
Ketones - Alkanones
H O H H H
H – C – C – C – C – C- H
H
H H H
For a ketone, the carbonyl group (C=O) is attached
to two other carbon atoms and is found mid-chain.
They are a member of a homologus series called
the alkanones, which ends in –one.
The position of the carbonyl group must be
indicated in the name e.g pentan-2-one.
Individual Tasks
• Stick in both sheets of appendix 2.11
• Turn to page 21 of your work booklets and
complete the tables for the straight chain
alkanals and alkanones with up to 6 carbon
atoms.
• Exercise 2.5 on page 29 of your work booklets