3.3.4&3.3.5: Alcohols and dehydrating them Flashcards
General formula of alcohols
CnH2n+1OH
Types of alcohols
3
primary
secondary
tertiary
Primary alcohols
The OH- group is attached to a carbon with one alkyl group attached
Secondary alcohols
The OH- group is attached to a carbon with two alkyl groups attached
Tertiary alcohols
The OH- group is attached to a carbon with three alkyl groups attached
Dehydrating alcohols makes
alkenes
Elimination/ dehydration reaction
alcohols to alkenes
Example of dehydration reaction w/ ethanol
Heat ethanol w/ a conc. sulfuric acid catalyst
then separate the ethene formed from water and remaining acid and reactant
Dehydration of longer, unsymmetrical alcohols can result in
more than one products
Purifying the product of a reaction
3 steps
distillation
separation
purification