CPrac N - Organic synthesis and purification

ROR for organic VS inorganic

• Organic: Covalent bonds header to break -> slower ROR inorganic 

• Inorganic: Ionic bonds already can form bonds 

Draw heat with reflux apparatus

Draw Heat with distillation apparatus

Describe purificiation of organic Solid product

• Filtration → recrystallisation → melting point determination

• Pure organic solids have a very sharply defined melting point range

• Dry solid organic products can be obtained placing it under an infra–red lamp to dry or air–dry

Describe recrystallisation

Describe purificiation of organic liquid product

• Organic liquids are impure when aqueous reagents are used

• Separation → drying → distillation

1. Separating funnel is used to separate the organic product from the aqueous solution

2. The mixture is washed with water to remove unreacted aqueous reactants

3. After separating, the organic liquid is dried with an anhydrous ionic salt with have high affinity for H2O molecules (through ion–dipole bond formation)

4. Solid Na2CO3 added to remove unreacted acids -> there will be effervescence of CO2 

5. The mixture is filtered is obtain the organic liquid which is further distilled at the boiling point range of the organic compound to obtain the pure product