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Alcohol por Mind Map: Alcohol

1. Iodoform test

1.1. Alcohol + aq. alkaline I2 forms salt + CHI3

1.1.1. Warm

1.1.1.1. C2H5OH + I2 + OH- forms CHI3 +I- +H2O + CHOO-

1.1.1.2. C2H5OH + I2 + NaOH forms CHI3 +I- +H2O + CHOO-Na+

1.2. Yellow crystals formed and tested positive with iodoform test

1.2.1. Ethanal

1.2.2. Ethanol

1.2.3. Methylketone

1.2.4. Alcohol with formula CH3CH(OH)-

2. Oxidation

2.1. 1°OH

2.1.1. Forms aldehyde (CHO) if distil

2.1.1.1. Acidified K2Cr2O7 / KMnO4

2.2. 1°OH

2.2.1. Forms carboxylic acid (COOH) if reflux

2.2.1.1. Acidified K2Cr2O7 / KMnO4

2.3. 2°OH

2.3.1. Forms ketone (CHO) if reflux

2.3.1.1. Acidified K2Cr2O7 / KMnO4

2.4. K2Cr2O7 changes from orange to green

2.5. KMnO4 changes from purple to colourless

3. Reaction with Na

3.1. Alcohol + Na forms Sodium salt + H2

3.1.1. Example sodium ethoxide (O-NA+)

3.1.2. Turns phenophthalein from colourless to pink

3.1.3. Sodium sinks and H2 gas evolved

4. Formation of ester

4.1. Conc.H2PO4 + reflux

4.1.1. COOH + OH

4.1.2. COCl + OH

5. Acylation

5.1. COCl + OH forms ester + HCl

5.1.1. RTP

6. Substitution

6.1. Reagents + conditions

6.1.1. PCl3 + heat

6.1.1.1. C2H5OH + PCl3 forms C2H5Cl + H3PO3

6.1.2. PCl5 + rtp

6.1.2.1. ROH + PCl5 forms C2H5Cl + POCl3 + HCl

6.1.3. SOCl2 + rtp

6.1.3.1. ROH + SOCl2 forms RCl + SO2 + HCl

6.1.4. HX + heat

6.1.4.1. NaBr + H2SO4 forms HBr + NaSO4

6.1.4.2. HBr + C2H5OH forms C2H5Br + H2O

6.1.4.2.1. Cl or Br reacts with Conc. H2SO4

6.1.4.2.2. I reacts with H3PO4

7. Combustion

7.1. Alcohol + O2 forms CO2 + H2O

7.1.1. Heat required

8. Dehydration

8.1. Conc. H2SO4, 170°C

8.1.1. Forms alkene + H2O

8.2. Heated AL2O3

8.2.1. Forms alkene