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

SUBJECT-CHEMISTRY

CHAPTER-ALCOHOLS, PHENOLS AND ETHERS.

 Preparation of alcohols:
From alkenes:

By hydroboration –oxidation

By reduction of aldehyde and ketones
pd


RCHO H  R CH  OH
2
2

By reduction of carboxylic acids and esters.
(i)LiAIH

R COOH R CH  OH

4
(ii)H 2 O 2

R OH
2 H




R COOH R COOR'  R CH OH R' OH
H  Ni 2
From grinard geagent:
2 H O


HCHO RMgX  RCH  OMgX  RCH OH Mg(OH)X
2
2
R' R'
| |
2 H O
R CHO R'MgX  R CH OMgX  R CH OH Mg(OH)X







O R' R'
| | |
2 H O




R C R R'MgX  R C OMgX  R C OH Mg(OH)X




| |
R R

 Preparation of phenols

 Acidity of alcohol





2R OH 2Na 2R O Na H
2