Page 2 - Microsoft Word - Lesson note-1(Alcohols.phenols and ethers)

 Acidic strength:

 Esterficationa:

H



Ar /R OH R' COON    Ar /ROCOR' H O

  
2

H



Ar /R OH (R'CO) O    Ar /ROCOR' R'COOH
2   
pyridine



R/Ar OH R'COCl      R/Ar OCOR' HCl
    
 Reaction with PCl
3

3R OH PCl  3R Cl H PO



3
3
3
 Dehydration
2 H SO
C H OH CH  CH  H O
4
2
2
2
2 5
443K

 Oxidation
oxidation
oxidation


R CH  OH  R CHO  R COOH

2
CrO
RCH OH R CHO

3
2
PCC


CH  CH CH CH  OH CH  CH CH CHO


3
3
2
 Reaction of phenols
dil.HNO
Phenol  O-nitro phenol+ p-Nitrophenol
3
conc.HNO
Phenol  2, 4, 6 – trinitrophenol (picric acid)
3
 Halogenations:
Br
2 inCS
Phenol  O-bromophenol + p-bromophenol
2
273K
Phenol +3Br 2,4, 6 – tribromo phenol
2
 Kolbe’s reaction:

 Reamer – tiemann reaction

 Preparation of ethers
By dehydration of alcohol
2 H SO
CH CH OH C H OC H
4
2 5
2 5
2
3
413K