3.9 Carboxyllic Acids and their Derivatives Flashcards Preview

Chemistry 7404/5 > 3.9 Carboxyllic Acids and their Derivatives > Flashcards

Flashcards in 3.9 Carboxyllic Acids and their Derivatives Deck (21):
1

What is the structure of a Carboxyllic Acid?

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2

What are the key properties of Carboxyllic Acids?

They are Carbonyll compounds

They are weak acids

They partially dissociate

3

How do Carboxyllic Acids Partially dissociate?

This is reversible.

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4

How do Carboxyllic Acids react with Metal Carbonates?

Carboxyllic Acid + Metal Carbonate -> 2 Salt + CO2 + H2O

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5

How do Carboxyllic Acids react with Metal Hydrogen Carbonate?

Carboxyllic Acid + NaHCO3 -> Salt + H2O + CO2

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6

What is the structure of an Ester?

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7

What are the properties and uses of Esters?

They smell sweet so are used in perfumes and flavourings

They are polar liquids and have low boilign points so are used as solvents and plasticisers

8

How do you make Esters?

Esterfication of Carboxyllic Acids

Acid Catalyst- H2SO4, HCl, H3PO4

 

 

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9

How do you break Esters?

Acid Hydrolysis 

Base hydolysis

 

Hydrolysis means breaking by water/ H+

10

What is Acid Hydrolysis of Esters?

Breaking of an Ester to a Carboxyllic Acid and Alcohol

with Acid Catalyst- H2SO4, HCl, H3PO4

under Reflux

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11

What is Base Hydrolysis of Esters?

The breaking of an Ester into Carboxyllic ion and Alcohol using a dilute Alkali

12

What is an Acyl Chloride?

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13

What are the properties of Acyl Chloride?

Fuming Liquid

Cant dissolve in water; it reacts

Vinegar Smell

Dipole-dipole, so has a higher b.p than alkanes

Polar Molecules

14

How do Acyl Chlorides react with water?

Acyl Chloride + Water -> Carboxyllic Acid + HCl

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15

How do Acyl Chlorides react with Alchol?

Acyl Chloride + Alcohol -> Ester + HCl

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16

How do Acyl chlorides react with Phenol?

Acyl Chloride + phenol -> Acyllated Phenol + HCl

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17

How do Acyl chlorides react with Ammonia?

Acyl Chloride + Ammonia -> HCl + Ethanamide

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18

How do you make Acyl Chlorides?

 

PCl5

Carboxyllic + PCl5 -> Acyl Chloride + HCl + POCl3

 

in the cold

steamy acidic fumes produced of HCl

liquid mixture of products

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19

How do you make Acyl Chlorides?

 

PCl3

Carboxyllic Acid + PCl3 -> Acyl chloride + H3PO4

 

Mixture of Acyl Chloride and Phosphric Acid Produced

Fractionally distillated to remove desired product

room temperature

less dramatic reaction

20

How do you make Acyl Chlorides? 

 

SOCl2

Carboxyllic Acid + SOCl2 -> Acyl Chloride + HCl + SO2

 

two gases produced

21