Oxidation Of Alchohols Flashcards
Secondary alcohols can be oxidised to form what
Ketones
Why don’t tertiary Alcohols not get oxidised
Due to them not having a hydrogen to the hydroxyl carbon atom
Primary alcohols are oxidised to form aldehydes which in turn can be oxidised to form
carboxylic acids
When oxidising takes place for alcohols two hydrogen atoms are removed from the hydroxyl group and one
removed from the alcohol
The 2 hydrogen removed from
One from the hydroxyl group
One from hydroxyl beating carbon atom
Fehlings solution and tollens reagent
Are not strong enough to oxidise primary and secondary alcohols
As reduction is the opposite of oxidation, it can be defined as the
removal of oxygen or the addition of hydrogen to a molecules
This results in what
A decrease in oxygen to hydrogen ratio
When aldehydes oxidise to become a carboxylic acid an oxygen atom is inserted into the
CH bond attached to the carbonyl group
Why can mild oxidising agents be used to distinguish between aldehydes and ketones
Aldehydes can he oxides to from carboxylic acids but ketones can’t
2 oxidising agents for alcohol to aldehydes and ketones
Hot copper (II) Oxide
Warm acidified postassium dichromate ions
When an 1st or 2ndary alcohols are oxidised we go from orange to
Green/ blue by using adi
When copper (II) oxide is used it goes from
Black to red/brown
Oxidising agents for aldehydes and carboxylic acids
Warm acidified pdi = orange dichromate ions to blue-green chromium ions
Warm fehlings solution
Blue copper ions reduced to brick red precipitate of copper (I)Oxide Warm acidified
Warm tollens regrant
Colourless silver ions reduced to grey solid
