Preparation Of Aldehydes And Ketones
Chapter Name : Aldehydes, Ketones And Carboxylic Acids |
Sub Topic Code : 102_12_12_02_01 |
Topic Name : Preparation Of Aldehydes And Ketones |
|
Sub Topic Name : By Oxidation Of Alcohols |
|
Introduction
Aldehydes and ketones are widespread in nature, often combined with other functional groups.
Pre-Requisites:
Aldehydes and Ketones.
Activity:
Aldehydes and Ketones.
Real Life Question:
What are Aldehydes?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Aldehydes | An organic compound containing a formyl group. This functional group, with the structure R-CHO, consists of a carbonyl center (a carbon double bonded to oxygen) bonded to hydrogen and an R group,[1] which is any generic alkyl or side chain. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Aldehydes and Ketones | Aldehydes and ketones are widespread in nature, often combined with other functional groups. |
Real life uses :
Study the nature of chemicals.
Places to visit :
Chemistry laboratory.
Practical examples around us
| Examples | Explainations |
|---|---|
| ketones | In general ketones (R-CO-R) take the suffix "-one" (pronounced own, not won) with an infix position number: CH3CH2CH2COCH3 is pentan-2-one. If a higher precedence suffix is in use, the prefix "oxo-" is used: CH3CH2CH2COCH2CHO is 3-oxohexanal. |
What you learn in Theory:
The resonance structures on the right illustrate this polarity, and the relative dipole moments of formaldehyde, other aldehydes and ketones confirm the stabilizing influence that alkyl substituents have on carbocations (the larger the dipole moment the greater the polar character of the carbonyl group).
What you learn in Practice:
The presence of oxygen with its non-bonding electron pairs makes aldehydes and ketones hydrogen-bond acceptors, and should increase their water solubility relative to hydrocarbons.